Well having owned 2 GTI-6s all i have to say is that the phase 2 one felt quicker than the phase 1 that i had (also pushing out 177bhp in standard form )
What alot of people seem to forget is that this engine is VERY tunable it is also detuned by over 30bhp as 200bhp isnt a problem, that includes for the brakes, gearbox and clutch
On the road there probably wont be alot in it with a williams, i know i had a blast against one when i had my phase 2, it was close but it is down to the driver, also the GTI-6s gearbox has a few advantages over the somewhat clunky gearbox and the lighter clutch in the pug is much better than the renaults (it took 1 test drive of 10mins and id bought a 306 GTI-6... that says something after 4 yrs of renault 19 16v ownership!)
The 306 pulled great from down low, and im talking 25mph in 4th here! and the midrange is good too! but it didnt get the best hot hatch crown for nothing when it won it in the mid-late 90s, it did it because it was worthy
Tony