Humm, my Alexa doesn't know anything about the Alexa Silver Edition or the Amazon Echo Silver Edition
Wonder if Google Home does....no, she doesn't either.
The only trouble I've ever had out of my TP-Link smart outlets is when the TP-L servers went down.
I've noticed (as others did a few months before me) Alexa seems to be having a harder time hearing me.
Google Home has super human hearing!