106 and saxo are identical cars, same chassis, same suspension, same engine, eveything.
its just cosmetic differences. i have a track day saxo VTS, on throttle bodies, roll cage, grp N suspension etc etc, and it is an amazing car, out handles 95% of stuff on track days, and goes pretty well in a straight line too!!
gti6 is a nice car, but hard to find a total minter.
clio, not really experienced one, but getting a bit old now?!?!