In summary both of these radar detectors are very good and similar in many ways. Both share the same antenna platform (M4) and both have bubble convex lens (Helps Sensitivity) and both also have an integrated GPS for red light and fixed speed camera warnings. There are some differences which we highlight in our writeup of the
Beltronics PRO-500 vs. Escort 9500ix on our main site but you cant go wrong with either one of these great detectors.