I am presuming Castello:
http://www.whatifsports.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=1772597
For point guard and Marden:
http://www.whatifsports.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=1814399
For Shooting guard, but does anyone think differently? IN absence of other differences Castello has a higher Pass, and lacks the PER game of Marden, so it seems by default Castello would land at the point which puts Marden at the Shooting guard pos.