Finally got some info out of the neighbor on the mods to his G2..
I knew about the exhaust and intercooler, but he informed me he has different Garrett turbos, blow off valves, exhaust, **** injection, multiple tune profiles (all custom and done on the Dyno) etc, etc.
He has struggled with a few issues along the way as he had the system built from scratch, specifically getting a tune he is happy with.
So to say the lest, I feel pretty good that a factory installed Ford/Roush 6.2 runs pretty good against a highly modded TT Eco.
To be honest, the drag race and WOT is not really the game for these trucks, we use them in the dirt, and I still feel that the 6.2 just feels more fun.