Gregg hit it on the head. I highly doubt Entercom is going to take either KKWF or KMPS to a classic country format. My guess is they'll do what Hubbard does such a good job of in Cincinnati with WUBE and WYGY. One will be a "CHR" country - playing the hits, personality driven, tighter playlist, etc. One will be an "AC" country - playing some of the new stuff, and the rest from within the last 5 years - focus on the music and familiarity.
Couple of reasons for this. First, if doesn't leave a lot of room for another operator to launch a 3rd country station in the market. Second, you'll own that country audience completely...if KKWF is playing Luke Bryan and then goes to commercial, and a listener flips to KMPS and hears George Jones, what are the chances they'll stick around? But if they hear Darius Rucker Wagon Wheel or Zac Brown Chicken Fried, country "golds" at this point, then you'll keep that audience. Third, and most importantly, classic country as we think of it attracts an audience well past that 25-54 money demo. Entercom has always been smart about not letting their formats age out of that 25-54 demo. KMPS and KKWF will both be country come December 26th. They'll look and sound a bit different, but not much. That's my guess.