re: I'm under the impression that...(Bama/LSU)

I think both secondaries are phenominal, but the amount of turnovers that LSU's defense forces (specifically the secondary) makes me think that LSU's secondary is slightly better only because they force so many.

Alabama turnover margin: .2 (with 3 fum & 5 int)
LSU's: 1.8 (with 6 fum & 6 int)
(per cfbstats.com)