He's not 250...
He's 230 and benches 300lbs easily
To answer OP... Yeah they're pretty good.
The youngest could eventually be the best one. Been playing varsity since he was like 13/14. Everybody who hasn't watched them only seen summer league shyt where he's basically the only nikka on an undersized team of neighborhood kids thats even ranked.
Zo is the most athletic and best passer and probably best overall though. Gelo is more of a workhorse scorer (lead the teams in scoring even when Zo was there). Like Zach Randolf but can shoot 3's and is a guard
Melo is flashier and more creative with getting his shot. I think they will all be in the nba together