Hmm, well my turbo has a few aftermarket bits on it (chips, Dual Port Wastegate etc) which are supposed to deliver a bit more power and torque than standard, but delivered earlier in the rev range - ie less turbo lag...
The reality is that compared to modern turbo installations ( think current Golf GTI ) then my car still has two definite sides to its personality, namely off-boost and on it[

]
I haven't actually driven an S2 ( a 160hp 924s, yes ) so unable to comment, but with my turbo you cannot crawl onto a roundabout in second gear at 5 mph, put your foot down and expect instant go, for instance, where I suspect the S2 is far more tractable in day to day driving - with the turbo I have become more conscious of being in the right gear if i want instant oomph..(technical term[

]).
The performance of the turbo when on boost is addictive (god only knows what the 3.2 turbo boys laundry bills are like[

]) and that was my preference, but suffice it to say that whilst my car will trickle around town off-boost in high gears all day long, you can sense that it is not its ideal environment!
Horses for courses, I guess, although both are saturated with character and feel - two things sadly missing from most modern cars.
Good luck!