He's going to be a bigger risk for injury and we've all seen what that can do to a young QB. Plus Mason Rudolph is going to be much less scheme dependent, I realize the Ravens are working "in the lab" etc... but that all raises the complexity of putting the pieces together for him to actually pan out.
Jackson has the talent to put an offense on his back, Rudolph likely doesn't, but a lot of other things have to go right first for that to happen on Sundays
and i dont know what you've been watching on film but rudolph is clearly reliant on scheme and jackson had pro-concepts embedded in his Louisville offence already - this idea that jackson's transition is going to be more difficult than for other qbs in this class is insane to me - he needs to learn how to take snaps from under centre and he needs to adjust his footwork accordingly but beyond that he already has a pro-skillset and some of the tools from college to adjust well to the pro game
rudolph on the other hand has inherent flaws that are problematic for his potential transition to the nfl - lack of arm strength, lack of reading the field and going through progressions, system-dependent qb throws, tendency to throw off his back foot when he has time to step up (remind you of anyone?)
to me rudolph's skillset suggests he could be a decent backup in the league and may eventually become an average starter but no better and his transition wont be easy or quick