Difference between software architecture and design

I found a nice answer to this recurring question at http://www.sei.cmu.edu/architecture/essays.html#difference

There's an amusing resemblance between how Enterprise Architecture is seen at the RDW and the phrase "The [software] architecture establishes constraints on downstream activities, and those activities must produce artifacts [...] that are compliant with the architecture, but architecture does not define an implementation."

Maybe there's not that big a difference between Software Architecture and Enterprise Architecture after all? (On SA versus EA you could also look at this one.)