Did Volvo change anything mechanically when they launched the mk3?
My newly-acquired mk2 seems a lot more skittish at the back to my mk3's, and I'm only comparing 1.4's like for like - my E reg 1.4 won't slide on the corners even if I try, wheras the mk2 is all over the shop....

tyres and condition of the suspension will make a huge difference to the way the car handles.

The running gear is all the same. It will come down to the condition of you tyres shocks springs and bushes