I am by no means a football genius (I'm more the Al Bundy High School jock... lol) I just speak on what I think I see during games.
I think this game absolutely comes down to both lines and who dominates or controls the LOS. Thats SEC football 101 and why UGA and Bama have been so tough to beat historically. I can only think of Ohio State and those Clemson teams that are on par with their line play. As I mentioned, depth at these line positions, particulary on defense is a striking flaw in ND when they've played these guys. Its one thing to have elite starters and play their elite... its entirely different to have to sub in for those starters with lesser talent while they sub in another 4-5 star talent for a few plays.
I'm not convinced UGA has the offensive weapons to be a huge issue for our defense. I am concerned that our lack of depth on the d line will be an issue late in the game. Even IF we'd beat UGA, thats going to be a major issue moving forward in the next round.
The only other comment is on offense. To me, our Offense and its scheme is built well for this sort of game. IF they execute and limit mistakes, they are very good at dinking and dunking their way down the field. We've seen this all year. Time consuming drives, picking up 4-5 yards a play, with some big broke plays. Its a great formula against a Georgia defense that I'm assuming will come out very aggressive. I think I said this before, but this offense feels like the old Tom Brady and New England offenses where they just wore you down with screens, short slants, the occasional tight end getting involved and every now and then stretching the field. They didn't have a great deal of vertical weapons at the time, but they won super bowls with that formula.