It's got a bigger compressor so it makes sense it would have more top end. What doesn't makes sense to me, is the supposedly better low end, which is why I want to see real people dyno numbers. Then again, I'm not the most knowledgeable person on the subject.
What's the turbine size on the Tomioka?
The compressor is quite a bit bigger.
I can tell you that, based on my pulls yesterday on my old IS38 file, it is noticeably laggier than the IS38. It didn't drop off at all, though, straight through to 7k rpm.