The dimensions are the same, in fact you cant tell one from the other by looking. The difference is that the spring inside is replaced by a flat ceramic magnet which holds the stick centered. There was feedback on here that some people found the T-Stik too stiff and the Mag-Stik has a lighter feel. But joystick feel is a very subjective issue and maybe the differences will not suit everyone, with some people preferring the heavier feel. If there is a demand we could stock both types.
Andy