Lets look at their first two years (both third overall picks)
Bortles
635/1081 58% 7336 Yds 6.8 YPA 46 TD 35 INT
Darnold
473/793 60% 5507 Yds 6.9 YPA 34 TD 27 INT
Darnold is the next Blake Bortles IMO. Big athletic kid who can’t really read a defense. Bortles is a much more dangerous with his legs, and Darnold is slightly more accurate on short passes.
I hope I’m wrong about Sam, but I’ve said it once and I’ll say it again. The kid is a likely bust and I’d advise all Jets fans not to get emotionally attached to him. He’s not going to be the QB of the team three years from now.