DeAngelo Russell is a pretty good comparison. They go about it a little differently but neither is regarded as an elite athlete... both have good size that can translate to the 1 or 2 in the NBA. Both can play on or off the ball. Russell has more length though but it looks like Murray has a little better short area quickness and Curry like abilities to create separation.
Murray's standing reach measurements are all over the place... recently 8'1 at UK combine... but 8'4.5" at 2014 hoop summit. I'd guess he's closer to 8'4" on standing reach just by his height and wingspan. 8'1" standing reach would put him at PG only in the NBA and part time.
Murray would be a good comparison to anyone that is a "shotmaker"... he seems to have it all when it comes to scoring....Shooting, runners, midrange, left hand, right hand etc... He has a randomness about his moves that makes him unpredictable while guarding him. One thing though... he is quick, but does not have elite quickness or elite straight line speed - so he'll look a little more human when he faces better competition. He's talented and skilled though and thus far he's looked good against better competition at the hoops summit and the Pan Am games. College is a different game and the intensity and focus of Ds will improve. Good thing is, he'll have Ulis and Skal to help him get open jumpers without having to do everything himself.