I'm unsure about this, but I think the Atari ST version of Street Fighter was better than the Amiga one, I mean, it still had the parallax scrolling (although it was tile-based) which the Amiga lacks, and I also think it ran a little faster?
Well, maybe the Amiga has better music to make up for that, either way, the port was rubbish, so that's not even remotely fair of a comparison...