would it come to pass that we would go into the discussion of weightlifting gear (and I do hope we can avoid that) we would have to consider function over form. Squat (and in particular the squat done in olympic squat form) benefits from heel. Tried and proven method is to use wooden "heel", there are also plastic editions etc...
Deadlift should not be done with squat shoes. Chuck tailors work nicely for the deadlift. Way better than frees. Chucks work better for squat (esp low bar) than frees as well. Ofc the ones you linked are about perfect as well... just not as multipurpose as chucks.
When you're liftng 220pounds and up of course. Lifting 100lbs can be done in zoom vomeros as well.
Not all squats benefit from wearing oly shoes, some people deadlift in oly shoes. On the rare ocassion I deadlift with a conventional stance I wear mine. Bar position isn't going to effect whether chucks are better then frees. Don't see how chucks are better the deadlift slippers for any lifting purpose