Castellanos was a very solid for BC last year when he was healthy. He played very well against a Mizzu defense that was statistically much better than Bama's defense last year.
Florida State has some dudes, but Bama has a lot more. I am not convinced Norvell is a good coach, but I am also not convinced Deboer is a great coach. And Ty Simpson could be really bad.
13.5 points seems right since Bama is more talented. If Ty Simpson has improved considerably, they should cruise. If not, FSU could pull the upset.