The ultimate question to all these things would be: Why?
For me when I first bought my BPPC, (BVision was not around by that time I think) PPC programs were unstable, most of them seemed to run very fast but with constant occational pauses which was irritating. ( like one movie player and some unarchivers) When warpos was released performance dropped a little but the pauses went away. This is what I remember about Powerup vs Warpup. I was happy about warpup.
It was different for us CSPPC users; PowerUP was exceptionally stable. Then WarpOS came out with their claims and their software and things just got worse.
Not long after I gave up on the Amiga; I stopped my native PowerUP AROS port and packed everything away.