I know the obvious differences between the two, but what about detection range? I thought the detection capabilities were more or less the same, as is implied on the Escort website. However, I was a bit shocked to see some testing (maybe GOL, I can't recall) that showed the 9500i faired better than the 8500 x50. So, are the detection capabilities better on the 9500i? I thought the difference in price was because of all the GPS stuff, voice alerts, etc. Sorry if this has been asked before.