I'm also in the market for a Wahoo smart trainer, but am undecided between the Kickr Snap (wheel on) and the Kickr Core (direct drive). I had a wheel-on trainer many years ago, and it really wore down my rear tire and created a lot of black rubber dust. Are the newer trainers any better for this? Do most people use separate "trainer wheels" to avoid wear on their nicer road tires?

Are there other advantages to the direct drive trainers other than wheel wear and tear? Is the road feel significantly different?