I'm almost positive you'd be able to re-download it. A couple of pros for each that you may have missed are:
1. For the disk version you can always sell it back or trade it for something else down the line, you can't do that with the DL version.
2. The disk version has a bonus documentary included, it is rumored to be downloadable later, but that's not guaranteed.
3. For the DL version, if it's like other titles, you can share it with 4 of your friends, so if you split up the cost, it ends up being pretty cheap.
Good luck with your choice. I'm personally gonna get the disk since I like trading my games when I know I'll never play them again, and I just like having the physical media for some reason (I think it just feels more like it's worth the money).
