Zylen92 :
if trackball was better pro gamers would use it. But i have never seen anyone. In my opinion mouse beats trackball because some mouses (like mamba) have incredible dpi which none trackball can compete with.
Trackballs actually need to be subdivided into finger and thumb as they're quite different and some people who really like one dislike the other. I'd suggest someone try all 3 controllers and see which works best for them. Mice however have a huge advantage simply from being what most people experience first and each controller requiring time to get comfortable with it.
There are a number of reasons a trackball SHOULD be superior to a mouse and it seems odd that we have gaming mice but no gaming trackballs. I think the reason we do is simply because so many more people use mice for general controllers.
Trackball Pros vs Mouse
+Trackball gives much better control and speed in combination with less sacrifice of the other.
+Trackball is a more natural use of your hands for moving. With prolonged use my wrists get sore with a mouse, but not with a trackball.
+Fingers (or thumb) are naturally capable of much quicker and more accurate motion than our arms are.
+Trackball never needs to be picked up and moved over to keep turning and operates in a tiny desk space with no problem.
Mouse Pros vs Trackball
+Mouse leaves your fingers more easily available to hit combinations of buttons than a finger trackball (while for me at least, the thumb trackball does not have as big an advantage over the mouse in terms of movement control).
+Mouse gives you a ton of options for gaming units while there are no true gaming trackballs (although CST LaserTRAC 2545 comes close).
Overall though, I think I'll continue gaming with a Logitech Trackman until someone comes out with something better or I decide to give the CST LaserTRAC 2545 a try.
Also see:
http://www.tomshardware.com/forum/108400-13-perfect-trackball