Thats cool, i don't use either right now. Is it fast ?
Well Anime Tennis Babes casts shadows from one light source to four players ( in doubles mode ) onto two court meshes. I can even turn on soft shadows and get no slowdown at 1024x768. Now ATB doesn't push the hardware too much in other areas. In fact it's optimized to the point where it runs on Intel onboard things with 8 meg of ram. And my machine has a Radeon 9700 Pro in it. But I think other people have tested it on much lower hardware with similar results, so I'd say that was pretty fast. And bear in mind that soft shadows are really intensive. Ordinary non-soft shadows are much faster still.
I doubt you could do faster in Blitz as it stands.