If you tried the Evo and liked it, why not get the Evo? I ride mine all over though I'm sure on the black/double pistes, the Proto-CT would prove superior. I'm sure the Proto-CT would be better off 30+ foot kickers, too. It will be more expensive than the Evo, I think I saw the list price was like 539 or something, whereas the Evo is 489 (USD).
The Heritage is much more big mountain oriented and would excel at mega booters and big gaps. I would definitely would not want it for tecnical jibbing, especially indoor parks. The Proto-CT would be a lot better here even if it wouldn't be quite as good as the Evo.
I've never ridden a SB, just Gnu Park Pickle. I found the Park Pickle to be comprable to my Capita Horrorscoe, though I prefered the flatkick over Gnu BTX camber. Between the two you are looking at, I'd definitely suggest the Proto CT over the Heritage. It can bomb, maybe not as good as the Heritage (or even SL) and will actually be fun @ indoor park.