Called up MatchMate Today.
The major differences:
The Rookie (Blue model) only has one delivery wheel above the ball and thus only sends balls with topspin.
The QuickStart (Green model) has two delivery wheels that spin in the same direction so it does not in part topspin. Wheels are separated further apart to accommodate the larger ball size and does not handle the standard size balls as well.
Babolat Pure Drive "Black" (1/4) w/ Kinomy Leather and Tourna grip XL and Luxilon 4G 16 @ 50lbs. Pure Drive Play.