I guess you need to confirm the pin outs on both types of seat to confirm if the wiring will be the same.
If you already have the seats, you could physically compare the big connector under the seats, compare pins, wire colour and thickness and also look for the heated seat control module.
Also, on your current seats, to confirm if they are heated, look for a control module mounted under passenger / drivers seat.
I think mk6 will probably have the same wiring as the later type mk5 seats, which only has one control module under passenger seat, but you should confirm.
Jas