No taper mismatch. I had read on Sheldon Brown site that suntour in the 80s used a proprietary spindle different that either standard but closer to ISO so campy was recommended, which is why I used Campy.
http://www.sheldonbrown.com/suntour.html
I dont know about all Suntour, but the suntour spindle I have, which is no doubt a match for my cranks (mid 80s superbe pro road cranks and spindle) , is quite clearly the same taper as the campy spindle I am using. Both spindles visibly different that the shimano BBs I happen to have lying around.
Ah yes, Superbe Pro SQ is different than Superbe; my bad.