G5, 64Bit processing. Which is hella quick at a speed of 1.8 to 2.0ghz,
G4 iMac, Great machine, nice LCD monitor, quick enough to complete most tasks.
G4 iBook, Light, powerful, smooth transitioning, will be one of the quickest if not the quickest portable laptop your fingers have touched if your usta PCs.
All of them are great machines.. and so you ask what is the true deciding factor in the speed?
RAM
RAM
RAM
RAM
RAM