That's a rough take. Keegan has nowhere near the ball skills Franz does. Keegan is a below average ball handler and has yet to show he can self-create his own offense. Franz is ahead of him as both a playmaker and passer. The only thing that Keegan is better than Franz on offense is his 3pt shooting. He's also a better defender than Keegan. He can guard 2-4 and moves laterally better than Keegan against quicker guards.
Imo, believing Keegan is a better long term prospect shows heavy biased because he hardly does anything better than Franz on the floor.
As a 21-year-old in his 2nd year, Franz put up: 18.6pts 4.1rebs 3.5asts 1stl on 48.5/36.1/84.2.
When Keegan was 21-years-old, he was still at Iowa. I really don't know how you could go Keegan>Franz considering everything they've both shown in they career.. even comparing them head to head right now, Franz blows him out of the water.
Maybe we can re-visit this discussion when Keegan averages 18ppg over an entire course of the season.
We can revisit it when Keegan averages 26ppg -- which he
will within the next 4 years. I watched him play a lot at Iowa and rookie year Keegan was barely scratching the surface of what he's capable of on offense. None of his individual skills are eye-grabbing but the more you watch him play you can see how he plays with calculated aggression and preternatural poise
This is a discussion as old as the draft itself but I really don't think comparing players at the same age works for predicting future development. Guys come to the NBA when they're ready for the NBA and some of them never get better than their first year while others continue improving every year for a decade.
As a rookie Franz Wagner put up numbers as the number two option on an Orlando team that won 22 games. There's really no way to compare his rookie year performance to what Keegan was doing as the fifth or sixth option on a team which ultimately finished the season as the #3 seed. You can break down skill by skill and say which guy is better off the dribble, going left, going right, finishing through contact, passing out of double teams, etc. but that's still not going to tell you what will actually happen in a game
tomorrow. There's a long list of players who checked every box you can check from a skills stand point and were still mediocre pro players because they lacked something which is much harder to quantify. A mental edge perhaps and a methodology for dissecting your own game and finding ways to improve.
I'm not saying Franz Wagner doesn't have that. But if you're just looking at age, stats, and skills and assuming similar growth curves than you're going to way underestimate some players and way overestimate others. Predicting who is going to outpace the average growth curve and who will fall behind is more intuition and dare I say wishful thinking than data science.