Worth noting that the same setting, similar ambient temp and pressure have seen variations in dyno readings from 322 (above), 345, 368 bhp. So yes, it is a lottery. What you should be looking at is the difference between the two sets of graphs to look at relative performance differences. With the APR HPFP the difference in mid range is immense between 2/2+, although overall I think that Stage 2 is a more rounded package.