As a side note, it appears that Stingray is following a similar pattern with their “boom fm” radio stations. I noticed a post that someone put up on Boom 97.3’s Facebook page to call out the fact that the playlist in multiple cities is exactly the same, with the same songs airing in order.
It seems that subtle changes in song choice are indeed being made, with 97.3 in Toronto playing a few different songs that match the needs of their market better. I’m not sure if that happens in other markets.
This is more what I would expect to see in most scenarios (especially in the U.S. market), where a playlist may be adapted a bit to fit local tastes. I’ll give a little bit of kudos to a company that seems to get a lot of flack: iHeartMedia. The two classic hits radio stations I listen to the most are KJEB 95.7 in Seattle, and KOSF in San Francisco. Both stations use a lot of the same songs out of the same library, but they’re not identical. There are changes that keep each station localized to each market.