In September of 1992 Apple released the Performa 40x and 4xx series. These are essentially LC II clones. If you look inside one, exact same motherboard. The only thing that varies is the amount of video ram included and this varies by model.
In 2001, Apple re-designed the PowerMac G4 Line with the Quicksilver. This had a diffirent form factor than the previous Power Mac G4 computers, sporting a much sleeker case. This tough computer also includes one more PCI slot, has three PC133 RAM ports, and came with MacOS 9.2 and 10.1.