Both players are 20 years old.
Trae Young is a fantastic ball handler and passer who can create his own shot penetrate, and get to the foul line. This year, he only shot only 53.2% inside 5 feet, 47th of 69 guards who played as starters, and only 31.8% on shots over 24 feet, good for 55th of 69 starting guards.
It remains to be seen is if he can become an elite offensive player by becoming a more efficient scorer. But he will never get taller, and will always be a defensive liability.
Ayton, on the other hand, checks more boxes than any other young center. He is already an elite shooter anywhere inside 10 feet. On shots 5–9 feet, he is 4th among all starting centers (with at least one FGA per game), behind Noel, Horford and Robint Lopez, but finishes at the rim better than all of them.
He is also superior in most advanced stats: rebound %, ast %, ast/to ratio, eFG%, and TS%.
Ayton’s biggest weakness is on defense, as he will undoubtedly learn to recognize coverages and become a decent passer in the post.
The question is which will be more likely to happen: Young becoming an efficient scorer, or Ayton becoming a good rim protector?
I think Ayton could have a better chance in his career to make an All-NBA team than Young.