TonyM - Glad to hear from someone who has had the comparison of the 2.
Don't you think though everything you just said is just down to the stiffness of the suspension? I agree the ST is probably easier to get on with when thrashing but part of me just thinks its because the saxo is slightly too soft. Everything else is perfect, the chassis, the balance, the weight and feedback of the steering, etc.
I suppose its just down to what you prefer. I love the saxo handling but im always wanting it to be stiffer which is why i might get it lowered on springs & adjustable dampers. My GF has a 172, which also has superb handling, probably better than the ST so I have heard, but i still prefer my saxo any day to throw around corners.
I guess I'm just too biased to the saxo, but i can imagine the ST is a superb car to drive! If not a bit underpowered