Total # of wins I don't think is as relevant as winning %, and Saban has Bryant beaten by a noticeable margin there. Saban also has just as many titles as Bryant despite Saban coaching in a much more competitive era than Bryant did.
I agree with BOT that what Saban has done is more impressive, and honestly it isn't even all that close. I know many Bammers, even as good as Saban is, will never say that someone is better than the Bear. But what Saban has done is more impressive, IMO.
Also, in the modern era, I think you can argue that Urban Meyer is actually the second best coach, behind Saban. He doesn't have great longevity, but has an absolutely ridiculous .854 winning %, which is slightly higher than Tom Osborne. He also has just as many titles as Osborne (3), and he won them at 2 different schools. Meyer will always have a mixed legacy because of how he exited at Florida and Ohio St, but the man is an absolutely incredible football coach who I think you could argue is actually underrated.