just the top level wins and by so much, sure their d might not be as good, but I think they should be #1 but could see both sides argument for sure. 
Best resume of any team and they dominated Georgia in impressive fashion. Joe Burrow is certainly your Heisman winner. Chase and Jefferson are elite and CEH is a dangerous back when he is invariably not given his due attention. Aranda commands a defense that deserves significant respect, but one that is not invincible.
Pure, solid domination of the other; no surprise there for the best team in the nation. Doing so in what was basically a near-Georgia home game makes their #1 place more well-deserved.