The key here is expanding gases not flow, turbos work off of heat expansion, thus giving the diesel the advantage due to higher compression = more heat present.
Gasoline burns hotter/diesel burns slower. Typical max EGT's in a diesel exhaust is 1400 degrees where as a gas will be as high as 1800.
Yes, more compression will produce more heat. Comparing all things equally the gas engine will have the advantage.
__________________
'04 IS300 LS3/TR6060 swap in process
'89 Plymouth Colt GT - 411WHP, 2490lbs & 32mpg
'06 Magnum SRT8 - AFE S2, 3" Flowmaster catback, Diablo Predator (KIA by a drunk driver 10-25-13) 63 Nova 'Low Budget G-Machine' *SOLD*
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Threaded Mode