there are warp3d drivers from the CV64/3D, so it can take miniGL powered games like Heretic2 Wipeout2097, various QuakeGL ports etc, but all it is good for is bilinear filtering the same low res screens that you were playing with pure software rendering. no real speed increase bar a few fps/percent. but quake does look pretty :-D
infact more heavyweight games like heretic2 and quake2 might benefit more from just software rendering to its chunky buffers than using the actual 3d hardware, as you'll run out of texture memory real quick.
i think the CV64/3D is limited to a max of 3MB texture memory, and 1MB framebuffer if you have multimedia mem enabled. take half a meg off for zorro2 use.
anyway, as previously stated the CV64 is fast as its pure Zorro3 with a roxxler to help shuffle memory. but does NOT have a scan doubler. it has a monitor passthrough/switcher. if you scan double the input into the monitor passtrough/switcher thing then thats down to you. but you will need extra scandoubling hardware if you need it.
the CV64/3D, if you don't get the scan doubler with it, might aswell not have one as these are hard to get hold of otherwise. its still one of the fastest zorro2/3 grahpics cards you can get, and will make AGA look like its going backwards with regard to day-to-day operations.
i wouldn't turn my nose up at either one ;-)