I can compare the 38c GK SK to the 38c Vittoria hyper - on road there is a little more buzz but speed wise doesn’t feel that much different. Definitely don’t feel like tractor tyres.
Maybe tractor tyres was a bit too much. I commuted last week and I became more used to them. To convince myself I was considering putting back the supreme but tubeless setup doesn't make switching tyres easy.
I can compare the 38c GK SK to the 38c Vittoria hyper - on road there is a little more buzz but speed wise doesn’t feel that much different. Definitely don’t feel like tractor tyres.