Below is information taken from the Proel website verbatim. Please see the italic red comments we have made in order to correct the misleading information provided!
Proel LaserBridge	vs.		Competitor's bridge
Beam Size and Construction
The Proel machine uses a custom-made advanced heavy-duty normalized steel bridge that is designed especially by Proel engineers to handle the various operations and configurations of a moveable laser.  Our bridge can handle the weight and movement of a laser shuttle that is up to 400W.  It is made to handle travel speed of the shuttle that is up to 100 Meters/Minute (330feet/min).  It is also made to withstand any stress and does not suffer thermal expansion.  This construction helps maintain accurate travel for the laser shuttle on the bridge at high speeds and maintains consistency of laser beam placement on the garment throughout the entire year.  We guarantee it.		Our competitor’s machine uses an “off the shelf” beam that is not designed for that high speed of travel and can suffer significant thermal expansion.  It’s used for other applications in the industrial field but not necessarily for a moveable laser bridge.  This results in more flexing of the beam and distortion of pre-programmed locations, which threaten the stability of the drive and accuracy of laser execution.  To rectify this problem, our competitor added support columns in between the main columns that carry the bridge to reduce vibration.  But that still does not control the flexing of the beam as the laser shuttle travel back and forth repeatedly, nor does it address the thermal expansion effects on the machine’s calibration. This means that you will have to change the individual head setting for all the heads that are under the laser bridge more frequently and at random.  Besides, the extra support is blocking free access to the rear of the embroidery machine.
GMI:  YES, Proel has "custom-made" bar to save costs, we have the same option on our laser K model in order to save money (It costs 1100 Vs 1350 Euro per meter to produce).  In the case of the GMI III bar, it is made in Switzerland from GUDEL (world leader on barsfor use in automation), it is patented from GUDEL. http://www.gudel.com/en/gallery/index.php The quality of the GMI bar is the best available on the market today.. On the contrary, Proel uses standard grid gear (the same used to open house grid) this the absolute most economical gear system available on the market. It is not used in the automotive and aerospace industry for example.
Bridge and its Relation to the Laser Shuttle Drive
We engineered our bridge of fine 12mm steel and beefed up size to accommodate a laser shuttle of up to 400W for a very good reason.  The Galvanometric laser technology, which is used in the laser bridge by all manufacturers, has the ability to execute data of up to 99 Meters/Min in linear movement.  Our engineers considered this point carefully and matched our bridge with state of the art brush-less motors that can execute movement of up to 100 Meters/Minute to insure that we are properly utilizing the Galva technology as we integrate it into embroidery.  This is where the philosophy and experience of Proel sets its products above the rest.  It’s not just the design, but when, how and why you use it to achieve optimal performance		Our competitors have not even considered this point as proven by their selection of a much less rated bridge and drive system.   See above, this is absolutely the exact opposite of the truth.
GALVABEAM shape The GMI laser can go up to 120m/second! We reduced the speed to 90 m/min  to insure the a longer life, less wear and tear and for operator safety and OSHA compliance. For the record GMI has the most lasers sold world wide and the largest single market share. More than 50% market share in Italy alone. More than 250 at the time of this writing (March 2006) We produce batches of 20 lasers at a time. 56 GMI III lasers have been sold world wide since its release in October 2005!
Type of Laser Tube Utilized
Proel uses laser tubes that are air cooled for up to 100WATT.  It provides for sufficient cooling through cooling fans that are easily accessible and simple to maintain by only cleaning of the exterior filter.		Our competitor’s machine uses water-cooled tubes that require 2 additional water tubes for 50WATT and higher.  This would require more periodic maintenance to insure proper operation of the tubes.  Furthermore, should this maintenance procedure be ignored for any reason, it could result in failure of the laser tube, which if occurred frequently enough can cause permanent failure.  And that can be quite expensive to replace ($15,000 or more depending on the tube).
Laser tube's replacement can cost from 3K to 7K USD depending on the laser model not 15,000 as stated by Proel. Yes it’s a more expensive laser than the Proel version. It’s made by Coherent, The Worldwide Leader in Photonicswith the highest tolerance and consistency ratings in the world. http://www.coherent.com/Investors/index.cfm?fuseaction=Forms.page&PageID=9 Water cooling gives you the customer many advantages: Laser is ready to cut at the start up, while  the air refrigerated laser needs 15 minutes warm up. The water refrigerated laser has longer life than air refrigerated one (laser is always working at 22°C, laser with air  refrigeration changes from 30°C to 60°C) The power change  about 1% of 1degree change, The AIR COOLED LASER MAY CHANGE FROM 10% TO 30% .  This is a very important point when you have to cut the upper fabric without cutting the support fabric below (Kiss cutting The first cut on an air cooled laser is different from the last cut because of the method and efficiency of cooling. Think of an air cooled VW beetle technology or today’s liquid radiator. It’s a cheaper method not a better one! Maintenance only consists in cleaning the filter chiller fan, once every three month or one year, it depends on the environment, but in any case there is an alarm system that advises when the chiller does not or cannot work properly.
Laser Beam and its Accuracy during projection on the cutting surface (or “spot” )
Galvanometric lasers use downward conic projection of the beam.  Proel uses a laser spot that is 0.3mm (i.e. dimension of the laser beam on the cutting surface).  This is the best spot currently available on the market today for Galvanometric laser technology that offer large cutting area of up to 12”.  Furthermore, the Proel machine uses a special type of lens “F Theta”, which is designed and specifically used for the Laser Bridge to provide this narrow beam of 0.3mm spot.  The Proel machine projects its beam from a higher distance above the cutting surface (430mm).  This allows the beam to project the spot more vertically downwards and with minimal slant, especially at the extreme outer points of larger designs.  It will also reduce potential burn marks on the material being cut		With our competitors’ machine, you can actually see how much lower their shuttle is physically seated above the cutting area.  This lower point of projection results in an increased slant of the laser beam, which will cause inaccuracies during cutting of larger designs, such as full front shirt designs.  Furthermore, it will show more burn marks because of the projection of a slanted beam vs. a more vertical beam.
This is a picture of the GMI generation 1 laser from 1998/99 being compared to a 2005/6 Proel laser. A fair comparison would be a 2005/6 GMI III laser compared to a 2005/6 Proel laser. With regards to the best spot available on the market today, please see chart of facts below. Please also note that there is no air cooled laser made in the market that has a finer spot or point than a liquid cooled laser! GMI III was the first laser to introduce the variable field laser that allows the spot size to be adjustable. Single field lasers do not allow this.
Sophistication of the machine-control
The Proel laser bridge uses a RF remote control to operate the laser bridge.  This intelligent design allows the operator to operate the bridge from any location in the room, for example from the hooping table or from behind the machine as he or she is replacing threads.  It will also allow them to stack jobs for different machines in advance.  Most of all, it will not require a sophisticated operator to operate the machine.  With the remote control method, the operator can command the bridge to start another job on another embroidery machine while it is still running the first job on the first embroidery machine all without having to interrupt his or her normal routine of embroidering.  You can do so for multiple machines simultaneously without any confusion and absolutely error proof.  We guarantee it.		Our competitor’s machine uses push-buttons mounted the actual laser bridge body.  Not since 5 years ago!! It is only after the bridge has fully completed the first job and has actually returned to the full stop and parking position that it can be commanded to perform the next job.  This will significantly impact production because it will prevent the operator from doing anything else, such as thread change or additional hooping, or removal of hoops from the finished machine run, etc., until the bridge has completed the first job.  At which time the operator must walk to the machine, transmit the next job and then physically push the button to start the machine again for the next job.  This has proven to be counter-productive because of the delay in operation and has impacted the bottom line of certain companies already.  The bridge may cover up to 65’ span of production locations, which the operator will have to walk to and from back and forth as is.
From Specification Sheets ...
Maximum Engraving speed: 10 meter / sec (33 ft / sec) Maximum Laser Power available: 200 Watt		Maximum Engraving speed: 6 meter / sec (20 ft / sec) Maximum Laser Power available: 100 Watt
At the end of the this document Proel states that 200W is the top power yet the GMI III laser can pulse at 400W!