Given the choice, I'd take the G4. The B&W G3 has so many problems with the IDE disk controller that it is useless with any modern drive unless you get a PCI disk controller for it, and those cards cost a lot more than the computer. The G3 plastics are thinner and break around the screw attachment holes, also. Otherwise both are attractive Macs, and the Bondi blue color is a bit special in Mac history. The plastic shells can be mixed and matched, also, if you have both.