I don't know the ZS3 very well as mine sound awful - from memory the ZS3 sounded dark with a small soundstage and recessed, however harsh mids. I can't see a relationship between the ZS3 and ZS10. The ZS10's allegedly elevated lower frequencies are contradicting the phonograph's review. And another head fier writes that the ZS10 sound like the ZSR but with less bass. To me, the ZS10's mid bass is overemphasized.