If I recall the VB and the PC-FX use the same processor as well, or a damn near close one.
99%+ the same CPU. Nintendo got NEC to add 6 new instructions to their version of the CPU, but they're non-critically important additions.
That's why I got the VB guys to beta-test my PC-FX compiler patches ... they actually have an active (if tiny) homebrew scene for their machine.
One huge difference between the two machine's use of the CPU, is that Nintendo went "cheap", as they often did, and gave it a 16-bit memory bus, with wait-states.
The PC-FX runs a 32-bit memory bus, without wait-states.
That's a pretty-important difference when it comes to performance, especially on early RISC architectures like the V810.