I have made the same test on my A4000 + CSPPC060@80MHz (this card has 64-bit memory access and is faster than Blizzard1260):
default full screen (80%)
timedemo demomap q2demo1.dm2
fps : 9.2
The RTG version on CyberVision64 runs around 8% faster.
you can find a report that AQ2 runs in RTG mode at 10fps on 060@90MHz.
The 1.06 version seems to run much faster in actual gameplay than the difference in fps from previous version.