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.
Blizzard PPC card has its memory settings turn off ie no read/write waitstate,this is what makes a difference between my modifyed cards and other modification,this can be 2 seconds + quicker with this setting,this is why i wanted to find out if it`s true if the apollo card is faster.
my modifcation is done around this setting,this is why my card is fast or even faster than a Cyberstorm 200Mhz which puts it in second place as the second fastest classic amiga card.
the Cyberstorm 233Mhz is under threat and *may* lose it crown as the fastest classic amiga card,as iv discoverd something else whats slowing down my card,im awaiting some test result.