Originally posted by Zerstorer
Composition is how you frame the shot, 6X zoom allows for much greater possibilities in terms of perspective.
The G3 will not be able to handle the demands of sports/action photography where fast AF, low shutter lag is required. Also the 602 can shoot 5frames per second and has the very useful Final 5 frame capability.
Basically, if you need to shoot action pics, only the 602 or D7hi will do. But if what you shoot are static shots the G3 would also do fine.
I'd suggest you read the full reviews of each camera at imaging-resource, steve's digicams, dpreview and check the detailed functions of each camera.