If it's as good my Revo Stage 2, it won't be bettered by anybody's home brew tune, not even Nye.
If its ME7, I am confident that I could more or less match any tuner's stage 1-3 tune (k03/k04/rs6), especially if its for 91oct. No magic there. The limit is timing, period.
I expect the same for Simos 8, but for other very difficult technical issues having nothing to do with EFI tuning itself