I prefer the '70s/'80s/'90s Classic Hits blend over KOLA's unique '80s/'90s/2000s blend as I think '70s music blends in far better with the '80s than 2000s music, but KOLA is certainly great at what they do. Personally, KRTH with KOLA's rotations and playlist size would be my ideal Classic Hits station, as not only would it prevent burnout for the powers, but also give some of the songs KRTH is rotating in the 2-5 spin a week range more of a chance to shine. The selection of '90s songs on KRTH may not be too deep (yet), but it is fairly diverse in terms of genre and I actually really like most of the '90s songs they play. In general, KRTH's song selections are on point and really match my musical tastes, even if some on the board may complain about their rotations and playlist size, but they're at or near the top in LA for a reason, so props to them for that.KOLA has a great playlist that, at least to my eyes, resembles a variety hits playlist moreso than a typical classic hits station.
KRTH certainly has a very good playlist these days, but I think I prefer KOLA by a small margin.
93.1 Jack FM appears to have eliminated almost all non-rock music from its playlist to give KRTH more wiggle room.
KCBS-FM still does play a decent amount of non-rock music. They're definitely a really eclectic station that's probably best Adult Hits station in the country.