The Workgroup Server 9150 is the only Workgroup Server for which an equivalent Power Mac model was never released.
The 80 MHz Power Mac 8100 was the fastest Power Mac when Apple introduced the line in March 1994, and it was the only model to ship from the factory with a 256 KB level 2 cache installed.
The 66 MHz 7100 was the middle of the Power Mac line when Apple introduced its first PowerPC models in March 1994. Built into the Quadra 650 case, the 7100 has three NuBus slots and a PDS (processor direct slot).
The 60 MHz Power Mac 6100 was the entry-level Power Mac when Apple introduced its first PowerPC models in March 1994. Built into the Quadra 610 case, the 6100 contains a PDS (processor direct slot) that can be converted to a NuBus slot with an adapter.