I personally wouldn't call the HD neck vintage sounding at all. It's lower output than I expected, but it's very clear and bright and jangly and perhaps lacking in bass and mids to some extent. There's no mud there at all (which is a good thing), but otherwise it's not voiced like any "vintage" neck humbucker that I'm familiar with. In that sense it's modern to me. It almost sounds like a middle pickup or something, not like a neck pickup. While it sounds good I eventually decided that I wanted something that's more of a traditional "neck humbucker" sound.
I have not played a Riff Raff.