With KTFM, Mix, The Beat, and Party playing almost the same exact music, you have to look at other factors like signal strength, jocks, imaging, and overall sound of the station for ratings.
The Beat and Mix both have the best signals in town and a better overall sound. I can pick up some static in spots with KTFM driving through town, and of course Party is a rimshot station.
The Beat is by far the most interactive CHR in town with upbeat and highly energetic on air personalities. Mix 96.1 has the larger than life classic CHR imaging. KTFM is local, but all their jocks still sound voice tracked and there is very limited on air interaction between the DJ and the listeners. You can't develop a rapport with liners. KTFM imaging is nice, but definitely not the over-the-top imaging you'd expect from a CHR.
I really don't expect any changes in the ratings down the road with our CHRs based on these factors. I can only suggest that if KTFM or Party wishes to succeed in the market, they change one thing they can control -- their overall on air presentation. Differentiate by playing songs you won't hear on Mix or The Beat that test well in the SA market and you'll be able to develop a stronger following.