Allrighty then, now I've had a go in the Hyundai and from what I could feel I'd say that the rear end is a bit like a Porsche..... It's very heavy which results in a too big of a slide makes the rear end overtake the front end.
In the hairpin and 90 degree corners the handling felt very realistic but in the faster corners, especially on tarmac, the rear end was a bit too willing to go out of line to cause you a bit of trouble.
Be discription I can give to the feel that it provided, a rear wheel drive with close to only the rims providing the drive for the car.
But overall a very good update to this game, I really like the extra weight, it makes the car handle much more realistic, especially the FWD Golf Mk2 which I can compare very well to my own Mk1 Folkrace/Bilcross car.
I don't know how the modding works, but if you could remove just a bit of weight off the rear end, maybe by 5-10%, the cars would be very very good to drive
EDIT: Just had another go in the Golf. Don't you dare touch it
It feels fanstastic, very close to the real car