NEITHER! The Spitfire is a very nice plane but requires more advanced skills than you currently have. Wait until you are comfortable flying with ailerons, then get it. The Swift is prone to damage of the tail boom.

The best plane for you to get to learn to fly with ailerons is the ParkZone T-28 Trojan. There is simply no plane availble today that is better for moving up to aileron control. Planes that are almost as good are the Multiplex Minimag and the GWS E-starter.