993TT -V- 993GT2 power plants

[sleep envy]

I'm following the pissing contest on the other threads with great interest.

One thought which has crossed my mind is what are the differences between the power plants of the 993 tt and the gt2?

Speaking to VS a while back he was getting around about 450bhp from his tt with a different ecu, modified exhaust and std turbos. I understnad that to breach 500 bhp the bigger K24s are needed (along with high flow rate injectors) but what are the other spec changes to make this leap?

I'm asuming that the basic spec of the engine is the same for both variants.

[sleep envy]

That's surprising for 2 reasons, I thought the GT2 would be a bit more 'exotic' and secondly just goes to show how engineered the tt lump is.