Well I now have a Mk3 - 10 months old, SE spec with a CVT gearbox. 26 miles back from the dealers so able to do a very quick comparison with my Mk2 which I drove to be part exchanged.
These things are always subjective but I think the Mk3 feels just that bit more refined. One thing I did enjoy was the fact that, at 70, whereas my Mk2 Manual would be doing 3,500 rpm (give or take), the new car was doing just over 2,000. I guess, in a manual, the 6th gear on the Mk3 will also result in a more relaxed cruise.
Once I've cut my left leg off and stopped groping for a gear stick I'll be fine!