its like this, the mouse you use can influence your game upto an extent, but frags finally depend on you. you can't expect to start getting headshots by using the mouse.
also, according to me, the real charm of a gaming mouse isn't in it's dpi. the best part of my MX-518 is that you cn change the sensitivity on the fly. thats a real gud feature since you're not gonna want to play all the time at 1600dpi as it is quite sensitive. if the iball has buttons to switch sensitivity, it should be gud