I drove with one of those flexy $30 ebay wheels for like 3 and half years. I didn't sit in my car and try to bend it back and forth until it broke though.
If you're worried about your diff wearing out your tires it means you don't drift. So just get the cheapest stock lsd you can find. If you drift, you're gonna have different tires on like every week, so it don't matter.
I don't think that has anything to do with the amount of angle. FCs are front steer, but the control arm and the body are in the way of everything. I think it just comes down to whatever car has the most room for wheels turning all crazy.