DH started out amazing but it never reached its season 1 brilliance. It never even came close tbh. It was always enjoyable but never really extraordinary. & I can't really comment on replay value because its a one hour drama/comedy whereas SATC is like a sitcom but yeah....I watch the latter constantly still whereas I never even see DH on tv anymore nor do I have the desire to watch it.
Honestly, Desperate Housewives peaked in its 1st season in terms of quality. That first season was so ****ing amazing. I love SATC but I'll still go with DH.