The P90 is a submachinegun, the F2000 is an assault rifle. The P90 uses 5.7x28mm SS190 ammo and the F2000 uses 5.56x45mm NATO. Two very different types of ammo.
Both are definitely very cool guns. I find it sad that they made the P90 so crappy in CS. Guess they didn't like hearing "P90 wh0re" so they made it suck.
Eh, the P90 is my favorite gun in it. [img]/forums/images/graemlins/tongue.gif[/img]