First, I'm not arguing in favor of Clark. I don't know how I feel about him. But I don't think you can really point to SOS or any other metric without taking the full scope of the programs into consideration.
6-6? That was their best record since 2004. Funny you said "high water marks and droughts". UAB had a 2 year drought after that where they literally didn't even exist. They went 8-4 last year in their first year back after 2 years of not even having a football program. And that was a new record for wins as an FBS program. And they've already set the new record this season at 9 with 2 regular season games to play. Flavor of the week? Bill Clark has steadily been rewriting that program's history each season since he's been there. He's redefining what is possible for UAB football. And they keep getting better under him.
None of these things are true about Gus. He won big in year 1 and the program has been mediocre each season since except for one month last season. I would argue that 2 of the previous 4 coaches at Auburn were better. It's arguable that Terry Bowden was as good.
Bill Clark is the best coach in UAB history. And he's better in year 3/5 than he was in year 1.
Does any of this mean Clark can handle the Auburn job? Nope. But within the parameters of their respective jobs, Clark is a much better coach than Gus.
Oh, regarding SOS: we beat Southern Miss by 11 and UAB beat them by 3. We both played at home. I could see Auburn- 90,000 seat stadium, preseason top 10, reigning SEC West champion- beating UAB by 7-10 points at home. Sure.