I have tested my friends, Tippmann TPX, Tiberious T8, Piranha USP, and RAM Desert Eagle.
I just have the basic RAM P99 without the sight on top. I took a laser sight from an airsoft gun and put that on the rail.
Air efficiency, accuracy, realistic look.
Range and bounces.
I have had this marker for almost a year now. I have to start by saying I love this thing. It is a 1:1 scale model of an actual Walther P99 handgun. It works great with real blowback. The slide even stays back when the clip is empty. The .43 cal paint is much more accurate and is much better on air. I can easily us 7-8 clips with one cartridge which is much better than the 3-4 you can get with a .68 pistol. The one problem I have with the paint is that it doesn't always break. These balls are the same thickness of .68 balls but they are smaller. This makes them stronger and makes them bounce more. Other than that this is a great marker. It is also ambidextrous which is nice.
This is a great marker with its only real downside being the toughness of its paint.