As an Apollo 030/50 and BlizzardPPC 060 owner I can confirm that the Apollo card has faster chipmem access than the BlizzardPPC card but fastmem access on my 060/50 603/200 with SCSI is at lest as fast as the Apollo 030 card.
As such for running AGA games the Apollo card is better but for everything else the BlizzardPPC is much better.