Well, I don't know about the OP but I have seen both live; most recently Jones on Saturday.
For starters, neither has great handle. Jones has the higher upside, especially offensively. Clarke is the more complete player, especially defensively. Jones is almost certainly the better NBA prospect given his athleticism but Clarke may be the better college player because he's likely to stay longer.
Jones is as athletic as anyone in the entire class. He has added the outside shot to his game so if you leave him open he will make pay the majority of the time. Still doesn't have much of a mid-range game but his shot is smooth and he can easily add that. His size/strength make him capable of posting low and high alot like DeAndre did. The more I watch him play live and on film the more he reminds me of Rudy Gay, high end potential obviously.
Clarke is a scrapper. His game is all about intangibles; he'll rebound at a high rate, we'll never have to run a play for him and he'll do tons of other things that won't show up in a box score. No one on the court is gonna play harder and I would imagine no one will work harder in practice. He'd bring toughness and effort that will never hurt a team. An attitude very reminiscent of Jeff Adrien (not a style comparison). To me he looks to have the potential to be a Kawhi Leonard type; I have taken to calling him a more athletic/stronger Lasan Kromah.
I personally lean towards Clarke because I don't think we need more scoring but I most certainly will not complain if we land either one.