I have been trying both out for a couple days making passes by Leos using K and Ka band radar and have found out that my V995 m4 alerts 1-2 seconds quicker than the RX65. This surprised me. I thought the RX65 was supposed to be a better rd. The only thing I have found is that the RX65 has better features. The RX65 has never failed to alert but my V995 has better range in my opinion. I also do not think the RX65 has as good qaulity sound from speaker even though the RX65 is newer. Live and learn I guess. Will be saving now for my 9500i.