It is a fair question. And in my recollection the answer is: nothing. I think they're all just about equally bad.Most of us do, but they atleast offered physical upside and raw games. Yabu is an scared bear in a china shop. So if you want to make that assessment, what does Yabu do better than them?
But I thought it a worthwhile comparison because all three have/had some relatively unusual physical ability that, when viewed in the most optimistic light, made you think that they might develop into something. As others have posted, for Yabusele it is the size mobility combo. But all three looked equally lost in summer league games. I'm sure others could bring up more names to fit that bill.
Moreover, it seems like perfectly good draft strategy to take risks on players like that, especially with mid-round and later picks. If you strike gold, you look brilliant. It's just that the reality of them not working out is stark.