Lots of stats flying around, but an interesting one from Peter Burns of ESPN is: Baker Mayfield is the 8th Heisman winning QB to face a Top 10 defense in a bowl game.
The previous 7 are a combined 1-6.
I think the one outlier was Danny Wueffel.
There's also a chart showing balance of all playoff teams since it started, and OK is the least balanced (off/def) by a lot. If I had to bet, I'd go with Vegas and take UGA in a close one, but Clemson or Alabama in the big game. Not sure Clemson doesn't win it all regardless of so-so offense by playoff standards. I don't think UGA can score much on either of those.