/vr/ - Retro Games

Actually, both have about the same amount of worthwhile games...

Buuut if I had to choose, I'd say 32X was worse overall, in terms of history for Sega at least. The VB was just a side failed business for Nintendo, but it didn't really affect Nintendo's userbase that much. 32X on the other hand was an add-on planned by Sega of America as a sort of successor of the Genesis, while Sega of Japan made the Saturn.
So, historically speaking, the 32X had a more negative impact for Sega, than the VB had for Nintendo.

Tempo is my favorite game on the 32X, easily. It's a great platformer.
Likely, VB has Wario Land, which is arguably the best in the series, or at least it's up to the Wario Land series' standards, which I think is pretty high.
Other games I think are good on 32X were already mentioned, Kolibri and Cosmic Carnage (the last one is not actually good, but I still like it, love the bizarre characters, especially the japanese version which is like a toku fighter).
But on VB I can list quite a few more: Teleroboxer, Vertical Force, Red Alarm, Golf (yes!), Panic Bomberman (nothing to write home about, but it's a panic bomberman game, it's good), Jack Bros. (how could we forget the very first installment of the MegaTen series in the west? it's also a pretty fun game, although not an RPG at all), Mario's Tennis and Mario Clash which are OK, and the bizarre lovecraft-inspired game that was only released in Japan, Innsmouth no yakata.

So, regarding exclusive games, the VB wins, IMO.