Rock 105 vs. KZ 106

Am I the only one that is confused about the bashing going on with these two stations. The other evening I heard 105 play a little spot with a few highlights. In short, Pat Benetar making the rock gods roll over in their graves, those 'heretic M*F*ers', their own words (although I do agree with that assessment), and they closed with 'that's why they call them K Z 1-o-sux.' Did someone steal some talent, bit, playlist,... whatever. I used to listen to both before I moved away. I have never heard of anything like that. Most of the time, even in larger markets: such as Nashville or Orlando, stations try to not even mention any other station or in anyway even reference one another. I am curious as to what has happened to cause this? Any ideas?