I know, I know, these are really old detectors. I am a big fan of Whistler and collect all the classic models. I was wondering if you guys know if all three of these (Whistler pro 73, 58 and 1763) are the same overall radar and laser performance. They look to be on the same platform (appearance wise). I know the 1763 has no pop mode (who cares though). I'm talking overall K, KA band, and laser sensitivity. Are they the same components/horn?