[Super Bleeder!!]

I too looked into this about a year ago, and ended up deciding on the 2g head. Its smaller ports promote velocity and better cylinder filling at low and mid rpms, yet it doesnt seem to fall behind the large port 1g heads on the top end either.

Turbos are driven off of hot gas entering the turbine housing and expanding due to the drop in relative pressure. The turbine wheel captures this gas expansion as work.

A higher compression engine is going to have a higher pressure exhaust charge, which should facilitate earlier spool all things being equal.