The Apollo cards have a very fast memory bus, faster than the phase 5 cards. In fact back in the day AIBB memory speed benchmark of my Apollo 68040 was quicker than a PPC/68060 board we had at the local user group, when by all accounts it should not have been.
Apollo boards also have a blizkick-type utility call remApollo (on Aminet), and this lets you map the OS ROMS and other things like ftext and fblit into the fast ram. It makes a huge difference in operating speed. But get an '060 if you can.
TBH I haven't experienced any whdload games that didn't work with it since I upgraded my 68040 Apollo to an 68060.
