Beck
He's had to do more with less his entire career. Beck has never had the support the Ewers has (consistent NFL bound WRs, great OL, great Running game, great OC/HC). This year, Beck had no one the throw to, and a terrible OC.
Ewers has always had one of the best play callers/designer and a solid OL. And still, he didn't have the type of year that would get him drafted where he wants, hence he'll probably be in the portal. Besides maybe Oregon, Ewers will have less the work with than when he was at Texas.
Beck, on the other hand, will benefit from getting away from UGA and BOBOs 90s offense. For example, at UM, he'd undoubtedly have a better OL and OC to work with.
If we have a choice, I'm riding with Beck, just as long as he can come back 100% healthy