Okay - I checked my T2 v. S6 today.
I simply set both at 300 psi output on the reg and the IVG at 290 fps. Same barrel, sizer, and paint. Both had the same tank 22 CI with Myth reg.
8.33 psi per trigger pull on the T2
14.00 psi per trigger pull on the S6
Wow - that is a lot of difference. I will next try to keep the reg the same on both markers and try again.