While I am actually a very strong proponent of QB Rating, especially when the primary stats are comparable (And they are here), there is ZERO chance Griffin is a better QB than Luck.
He isnt asked to do nearly as much, and as PUTRID as the PacXX defenses Luck has faced are, they are MUCH better than the teams Griffin has faced
Cmon, he has those numbers against:
Stephen F Austin
While TCU is "Pretty good" this year, KSU is solid and Iowa State is mediocre.
SFA is Div IIA and Rice should be.
While Luck is running a pro set and calling many of his own plays, Griffin is running a true spread and never has to call his own plays.
As a developmental player, absolutely. I think his ceiling is very very high.
Better than Luck? No way, no how. Not even in the same ballpark.