Cam was a freak, for sure, so comparisons to JG are very surface. However, IIRC, didn't Gatewood run like a 4.7 40? He doesn't start quickly from what I've seen but, if he's that fast, he should be very comfortable in the new offense with him able to get outside the contain and have a full head of steam to run. The RPO offense we ran didn't seem to fit JG's physical traits as he doesn't appear to be overly quick to full speed or shifty.
Cam, even in the NFL, has had accuracy problems (some of it is his technique, imo). With a QB-friendly offense, I would expect whoever starts to hit > 60% pretty easily. If the receiving weapons are as good as I hope (mid-SEC level with a definite playmaker or two), I think the QB, whoever it is, will be put in a good position to be very effective. Allen never had much of a chance to show anything last year for a myriad of reasons. I think both QBs need to work extremely hard this summer on their physical conditioning, footwork, strength, playbook, etc. and work out extensively with the receivers to develop comfort and timing. Whoever works the hardest will be the starter, imo. I do expect all three (JG, BA and Levis) to play snaps in multiple games. I hope it's not another one series to handoff 3 times into the A gap, though. That drove me crazy. Even the few times the backups got snaps, they weren't asked to do anything. Hell, Gatewood had one series where they motioned him out twice and ran the wildcat the 3 plays he was in. I mean, WTH?