I'm a Duke fan and I've watched every game he's played in college thus far. The way he scores reminds me of a young Melo; he's very fluid & lithe without being overly athletic. His range is more on par with Robinson at this stage, although he will never average 30 ppg playing for Coach K as GR did at Purdue.
At this point in their careers, Melo and GR were better rebounders than Parker. They both averaged about 9-10 in college, and Parker is at about 8. But, not bad.
It's been said that Parker needs to work on his post and perimeter defense, and that's true. He's still learning the college game. But I have no doubt that he will strengthen these things under Coach K. His effort is definitely there, he's had 6 blocks in a game already.
What I've liked about Parker is that he never seems to get flustered. He's super-focused on the game and cool-headed. His attitude actually reminds me of Grant Hill's. That will serve him well in the pros.
I think he has all the potential in the world to be a star and impact a team fairly quickly. Wiggins, by comparison, has more athleticism and is a better defender, but is very raw. He's a longer term project. I would be happy with either one, but I am more partial to Parker since I've seen much more of him and I'm a Dukie. 