Leather seats are also heated, so unless you’ve got the winter pack in your car, seat heating of the leather ones will also be redundant if you fit these seats in your car. Come resale time, buyers might expect that they’ll be heated - especially when the weather’s like most of us are getting just now.
I’d keep your existing seats. VW leather isn’t the best quality and can also get loose and saggy, which IMO isn’t a nice look.