I can speak to cousins of both speakers, as I use Studio 60's (version 2, not the newer v3 or v4) as my mains and M3's as my side surrounds. Just based on that experience, I'd lean toward the Studio 20. The Paradigm's strike me as being more substantial in both build quality and sound. Sorry I can't speak to the specific models in question, but hopefully that may help a bit.