i have had both, the directstream sound varies considerably depending on the firmware version... the latest sunlight version is more forward and overtly detailed sounding than the gumby
both have nice air/openness, excellent bass (ds maybe a touch better) and natural mids
i was surprised how much the character the ds changed going from the windom version to sunlight (like you went from a mhdt tube dac to a chord) - took a sweet musical laid back sound and really pushed it forward, almost etched and aggressive
know also that with sunlight, there will be no more further firmware updates for the psa ds platform... it is the end of road for that generation of psa dacs