Yes Warp3D is the 3D driver API.
PowerUp was Phase 5's own environment for PPC software and Haage & Partner made their own and called it WarpUP.
You also cant run both Powerup and Warpup at the same time. Warpup comes with an emulation layer and can run ost Powerup things. I use Warpup sinc most things that are PPC support it and not the other.