With 060 66mhz I get 11 fps with Spectrum 16/24 and 14 fps with AGA. Screen size is 320x200 and 100%. Spectrum is quite much same card than Picasso II.
if you get faster AGA results as spectrum then i think this is only possible because AGA do pixel double.Z2 Bus is slow but 11 fps 320*200 are only 640 kb to transfer.
AGA is really slow normaly.
maybe real game run in 160*100 and it scale to 320*200 to fit the screen.
can you post a screenshot of AGA version ?
