I don't think Jackson is as much of a freak athlete as Wiggins in neither explosiveness or length, but he's a great prospect.
I just like Brown's game though, if he doesn't get himself hurt with how active he plays, he'll be a force. He doesn't back down, he's like a 6'7" Marcus Smart
edit: by the way, Jackson's talent from an offensive perspective is reminiscent of T-Mac, to piggyback off of what somebody else said. I won't really be able to truly digest how I feel about either one of them until I see them against elite talent.
If it comes down to just potential though Parker and Wiggins were still better prospects IMO, shame that Parker went down with a torn ACL.