Both are considered late 1st round picks mainly due to age (senior and junior) . Short analysis using scouting reports, games and video highlights.
Udoka Azubukie (6'11 280 pound monster)
https://www.youtube.com/watch?v=DdPJFaQlRuYPros: Monster body, chiseled, co ordinated. Likely stronger than many NBA centers. Decent post moves and good rebounder/shot blocker. Covers a lot of ground. Decent passing ability
Cons: Age. Poor shooter (40 percent at the FT line and none existent jump shot). Moves/runs well but plays an oldschool kind of game.
Comparison: Andre Drummond
Kaleb Wesson (6'9, 270 pounds)
https://www.youtube.com/watch?v=dWp-JwercoUPros: Sneaky athletic. Good at PNR because he can shoot the 3. Has a good BBIQ. Good rebounder, shot blocker and passer.
Cons: Age. A little on the pudgy side. Needs to work on perimeter defense/quickness.
Comparison: Al Horford
Celts may lose Theis and Kanter next season (contract). And Robert Williams hip situation is not promising. I like Tacko but I don't think he will be much more than a 3rd string NBA center at best.
Pending no trade or inability to sign a decent PF/C, the Celts will be left with a big hole down the middle next season.
Not saying either of these two prospects are the solution (late 1st round pick prospects). But you have to start somewhere and start building depth.