I'd like to make it clear that I haven't bought one of these characters from this seller.
However I have been down to Forbidden Planet and out of about 6 Vaders they had, one of them actually talked as well as breathed.
It does about 4 phrases.
I noticed its labels were different and it had a different batch number so I bought it. It's number is 1110 101231.
I couldn't tell you what the breathing-only ones number is.
I also noticed out of the Yoda's, some just did a Yoda-esque growl and some said one phrase only.
I've ordered a Yoda that apparently says multiple phrases so I'll update on that when it arrives.
So it seems to me there have been some variations in versions of these characters, without notification.
Possibly because of licensing complications, and it appears its the newer ones that have become less interesting.
Anyway, thought I'd share my findings because I would be pretty miffed if I'd only got a growling Yoda or a breathing Darth.