Seems like Flagg has Dylan's ability to drive to the hoop and Ace's ability to make mid range jumpers. The differentiator seems to be that Flagg plays defense at a higher level. He'll be #1 but I wouldn't be surprised if Dylan gets picked ahead of Ace.
That said, when these guys are all 24 year old men in the NBA, Ace might be the one you want.
Uh ... I would not characterize Flagg's relative strengths that way. At least not yet.
Flagg is not nearly as good as Harper in driving to the hoop. And Flagg's mid-range shooting is not as good as Bailey's mid-range game. And both Bailey and Harper are shooting 3's at a better % by far - though small sample size, admittedly. Just like the FT's are too small a sample size (like 1 totally weird game of 1-8 FT moved Bailey's FT from 75% to 60%). Consider this:
Overall FG%: Flagg 41%, Harper 52%, Bailey 47%
3-Point FG%: Flagg 24%, Harper 36%, Bailey 35%
2-Point FG%: Flagg 48%, Harper 59.5%, Bailey 51%
Flagg's primary "advantages" over Bailey at this time are: 1) Overall defense (no question, either) - 18 steals and 15 blocked shots in 11 games, as stats to Bailey's 10 steals and 7 blocks in 9 games (not that those stats are the only measure of defense - Flagg is better in unmeasurable defense also, I am sure); 2) Assist: Flagg has 40 in 11 games, to Bailey's mere 5 - a huge difference ... turnovers are actually about the same (Flagg with 25 in 11 games, Bailey with 22 in 9 games) ... Flagg has a slight edge in rebounds so far - but in the last 4 games Bailey is averaging almost 10 rebounds per game, so he may close the gap ... especially interesting since Bailey, by skill set and inclination is a pure WF, while Flagg is more of a hybrid/Stretch PF.
Flagg is a better defensive player than Bailey, by far, and than Harper (by some unknown margin - Harper is relatively solid defensively, Flagg is better than that). Flagg is also much more inclined to pass than is Bailey - and his teammates hit shots, meaning way more assists than Bailey ... and Bailey turns the ball over the most of the 3 players.