As my daddy used to say, "It's the same... only diffrn't."

To even discuss the idea, people need to clarify their personal, subjective concepts of what constitutes 'sameness'. After long, bickering debates, they will discover that it's kinda like my daddy said. SOME songs/music is very much the same in SOME aspects, and very different in others.

I personally agree that far too many pop songs have far too many irritating similarities to suit me... most about topic, but also about coherence and repetition... and very often, volume. However, if pressed to listen to a moderate list and classify them, I 'could' find some differences. I might even... now & then... find one that is relatively interesting or vaguely pleasant. But I am simply not familiar enough with most 'pop' to bother sorting thru 100 to find 1 or 2.
    ... and because for the first few years of Mudcat, I used to debate fiercely that 'folk' and 'traditional' were not defined narrowly enough, I dare not even attempt to explain MY subjective categories in pop.