Obviously the stock turbo on a neo is the limiting factor, so you won't find a direct comparison.
No one is saying the rb26 is not good, it's just that variable cam timing allows better power making, for both na and turbo applications.
Cam timing is a compromise. Being able to adjust it on the fly makes sense.
Someone needs to put stock gtr turbos onto a stock neo and see what happens...
Or finally get some results of the vct addition to the rb26 recently available.
Xkalaba s result is awesome by the way.