Dear dear. . . there aint half some **** being spouted in this thread....well heres hope fully a bit more sense!
Distance, right basically every single marker that fires the same ball through the same barrel will go the same distance (give or take a few metres). Why? Well if you throw 2 of the same things (2 tennis balls for example) with the same amount of force how far will they go? The SAME BLOODY distance. Its the same with paintballs the amount of force required to get a ball to 290 fps is the same, no matter if its low pressure force or higher pressure the actual energy required is exactly the same....
Consistancy, this is where the higher end guns out strip the lower end, by delivering the same amount of force behind the ball everytime and being able to maintain that at high rates of fire. This being dependant on air supply, regulation, valve and bolt flow But this also obviously comes down to ball to barrel match, worse the fit more of the air delivered is wasted.
Good consistancy and ball to barrel match will provide accuracy.....accuracy also has all the extra faults as well i.e. ability to aim, amount of kick from the gun and roundness of balls etc.
So that the way I see and as many facts as i cant be bother to type! if ya doubt any of that or don't believe it. . . . . i aint bothered!