It's a very interesting thing to watch because Allen was the classic "developmental prospect" with insane natural talent but lots of question marks about his football IQ, accuracy, pocket discipline, etc. And I thought Allen would bust simply because usually that type of prospect does bust...not that most top 10 prospects don't usually bust because they do. I rarely see players actually take huge steps up from where they begin, nothing against Allen. I think Trey Lance has some similarities there...also coming from a non-major conference and having chart shattering physical skills but not a lot else to be confident about.
Jones, meanwhile, is almost the exact opposite. Completely ready for the job, polished, pro ready. Has all the mental skills and decision making down at an outlier level for a rookie quarterback. Has terrific field vision and accuracy...played for Alabama. But the scouting report negatives were about his ceiling and whether or not he's a guy who can really carry a team or has a ceiling which is more Kirk Cousins/Alex Smith where he puts up solid numbers but never takes you to the next level. However, I wouldn't say that Mac's ceiling is so defined either; no, he won't have Allen's arm strength or gifted legs, but plenty of other great QBs have been able to make it without having blow-away arm strength or big-play ability immediately upon entering the league.
Allen was great last night, though...I would be really excited as a Bills fan. Patriots fans are excited about Jones, too, and hoping he can continue progressing. Without question, he was worth the draft pick, whether he can keep improving or not...that's a pick worth taking.