Both stations have their positives and negatives:
KRTH:
+ great sound, great jingles, great energy
+ consistent "feel" to the music - few jarring songs that sound out of place
+ VERY well selected 70s additions, with a handful of 80s. It all feels right.
+ they are now mixing in (and out) certain selections to keep it (sort of) fresh
+ very solid heritage - everyone from small children to elderly people know that jingle
+ superb signal that can be heard everywhere
- still too much repetition happening
- not enough lesser heard songs to attract a loyal audience of oldies/music fans
- DJs read off liner cards and often sound "canned"
- In December, they play bad Xmas music: Air Supply, Barry Manilow, with heavy repetition
WCBS
+ Station is more beloved than KRTH. The mayor would never comment if KRTH went off the air.
+ Way more variety in song selection. They clearly have more titles in the library.
+ More natural sound. DJs sound "alive" and genuine, if a little less tight sometimes.
+ Would be much easier to listen to all day than KRTH - less repetitive
+ Much more variety with the Christmas music, and more in tune with an oldies outlet (KRTH tries to be Adult Contemporary for a month. Yes, I see the rationale, but they should pick their niche and stick with it for brand sake.)
+ The themed days are a nice addition. KRTH has nothing like that. (KRTH's "themed" weekends are a farce - just the same music as usual.) KRTH did do a "no repeat" weekend once where they actually played unusual stuff, but this was the only time I've heard something like that.
- Despite this, the WCBS theme moments occur only once an hour. Not really enough.
- Some of the 80s songs do not fit well. "Like A Virgin," Georgia Satellites, etc. KRTH keeps the sound conistent by adding things like "I Can't Go For That" or "Start Me Up," avoiding the more dated or risque material from the 80s.
- Too much "classic rock" 70s material. Keep it skewed Top 40.
- Though better than KRTH, still not enough depth to the playlist. Nobody wants to be bored.
- Like KRTH, a smattering of pre-64 music would please listeners, regardless of age.
- WCBS sounds a bit more sloppy than KRTH: gaps, miscues, DJ mistakes, etc. Nothing terrible, but KRTH sounds more professional.
- Both stations have terrible websites that don't function properly
- WCBS doesn't sound "New York" enough to me.
- Both stations could use more specialty programming, such as a doo-wop show, a (real) all-request show, an Elvis show on when people are awake, some kind of historical program... Throw the music fans a bone!
My .02