I'm guessing height is one difference, a few inches makes a big difference. Mason also seems to be less able to create his own shot. He could still be a solid backup PG and maybe eventually a starter.
Gabe looks like a solid four year starter, potentially a star as an upperclassman.
I'm not sure the 2-for-1 is worth it though. Seems like we should be able to get a 150ish rated player without needing to take on a 300+ rated player as well. I know a lot of people love Brannen's recruiting, but to me it still doesn't look any better then Cronin's, and our best recruits (if we get Gabe/Mason) are a guy with legal troubles that kept teams away and a guy whose desire to play with his brother kept some teams away.
The other big concern I have is the lack of quality bigs. As I've consistently said, skilled big men are the hardest guys to recruit. We've gotten two 7' transfers (Vogt/Sorolla) who look rather unimpressive. Our tallest freshman recruit is a 6'7" SF. If Mason/Gabe commit it would leave us with 2 scholarships remaining for next year. With only 2 guys over 6'7" on the roster for next year (Diarra/Vogt), I'd hope both scholarships get used on bigs.
I know others aren't concerned about our lack of bigs as I am, so hopefully I am proven wrong. I feel like I've seen too many games where a P5 team with a pair of quality bigs can just dominate a mid-major team that lacks size on the inside.