I have ran VF30, 34, and a frankenstein TD05 16G. Power output was pretty much the same (using same tuner) but 16G edged out. Spool time was faster with my VF30/34 then the 16G. At the time I ran these different turbos, I was running a TXS Stg4 + and only TXS parts.
All 3 turbos will yield you the 260-280awhp range but this will vary on what Dyno is used.