ATM its a 3kw gain. But as I said I havent touched the timing really, just trimmed the AFR's to be alright.
So there might be a little more power in the tune, but the way I've modified it, it may have a slight leak so that could also be causing a loss in power (it is a temporary thing at the moment)
The main difference is overall driveability, it feels alot better on the street, slightly more responsive (not a great deal but) and I was having an issue with what sounded like surge at around 16psi in 5th gear (short version of what was happening) which has disappeared now.
So basically at the moment its an improvement. But its not on par with the Pro S