Watching Wainwright, I see a try hard guy with very little talent. He's physically strong, but that's about it. In the Nuggets series, we were desperate for any bench player to make any kind of significant impact. Ish did not. Could this be Monty's fault? Possibly, but I doubt it.
Wainwright turns 29 this year. Bol turns 24. Could Wainwright elevate his game at this stage? Again, possibly, but the odds are against it. Historically, do players see greater gains in proficiency at age 24 than 29?. Yes, they do.
Do we have guys on the roster around 6'6" that can play defense and shoot the 3? Yes, we do.
Do we have guys on the roster around 7'2" that can block shots, dribble, and play on the perimeter. Well, we have Kevin Durant, but that's the closest we have to this.
In terms of potential ceiling, there's really no argument to be made for Wainwright over Bol.