The hits aren't the same everywhere. What works in one market, doesn't always work in others. It's not necessarily "better music", in some cases it's more variety, in other cases it's quicker turnover, in others it's better quality, more new music, etc. It really depends on the market, and what the PD is screwing up. Like I said, music is the #1 reason most people listen to the radio. Other elements "enhance" the overall station.