I think a valid point is made with an emphasis on SOS. Davis has to run against NE, Jax, Tampa, and Tenn. Davis has yet to prove he can run on anything but a sieve for a defense. His 100 yard games have come against the Jets, Indi, and Cinci. He does not have an easy schedule. Make no mistake about the Jags, they give up oodles of points but only one 100 yard rusher this year (S. Davis).
You've heard it here first. D. Davis is going to be a real poor play down the stretch.
I can't shout praises for Rudi yet either, except that he's had a ton of yards the last 2 games. Maybe he's getting into his groove but he hasn't exactly pounded on any defenses worth noting. I think he's shown more than Davis and he can probably be said to be on a better team. His schedule isn't a softie either here on out. There is that concern that he'll share carries with Dillon or that Dillon will start over him when he's 100% (according to Corey).
I probably wouldn't use either of these guys if I could help it. If I had both, I'd probably play it by matchups or if you can't decide and you know both will start, I'd probably go with Rudi.