Instant boost = instant wheel spin (ask Ion what he thinks). You'll easily hit 400whp on a fully built engine with a fast spooling turbo like a GT3071R or 3076R. I would stick with the turbo, but that's just me. More efficient, easier to intercool, more power potential, easy to turn up the boost.
Turbos are not way better cuz I like them, I like them cuz they're way better