I don't know man, might have something with your setup at the time. I remember I did some testing, and to be honest, BHUNP is the superior body, it blows 3BA out of the water in terms of both collision and jiggling. It's not just me saying. Ace and Aietos, Ostim's animator and one of the developers, also claim that BHUNP is the superior body for naughty scenes.
But this is not an encouragement for people to drop 3BA in favor of BHUNP, at least not necessarily. As I said, the mod support for BHUNP in terms of clothing and armor mods is rather poor compared to 3BA. This is why the latter has way more users if you check the download numbers.