Shotty will likely last longer. With Dak’s age/injury history, coupled with the fact that Jerry doesn’t fire coaches early…they probably at least tie.
The only way I see Jerry firing Shotty early is if they really struggle this year (8-9 or worse…which is likely enough with the schedule), and Shedeur Sanders has at least a few exiting moments, and another Browns QB also plays well enough where it makes Sanders trade bait. I could see JJ hiring Prime then and trading for Sanders. Prime will probably be more likely to take the job to help his son improve his image than he was a few months back when he didn’t think he needed to.
But that scenario is a long shot…so I say Shotty lasts longer than Dak…