Yeah totally. But then again those three GUN mecha really stand no chance, having been taken out by Sonic, Shadow and Rouge. If they were up against an actual other mech then they'd probably get cut to ribbons.
But I dunno, maybe the reason they got defeated so easily by the SA2 cast is because they are much bigger and more cumbersome than Sonic, Shadow or Rouge, who are all more maneuverable than they are and can use homing attack or glide attack against them.