Both header types will make power across the whole power band over stock, it's just where the majority of the power will be that's the difference.

I'm unfamiliar with supersprint but from a 30 second glance at their product pictures I think it looks like hell.

Moving on, in the most basic view of things 4-1 headers are better for top end power, which is what you'll want to get with that b16. But the quality and design of the header is more important than whether it's 4-1 or 4-2-1. You could get a crap 4-2-1 and I could put a good 4-1 on there and make more midrange power. It's really up to your budget and power goals but I wouldn't put a header that looked like those supersprints on my car... that looks like the kind of crap DC was putting out in the mid 90s.