Goldva said: Same voice actress? ...Though I'd guess Matsuki Miyu's voice is too soft for Sakuya.
Hmm, don't know. I know Rie-sama did Sakuya's voice in Maikaze's fan-anime, I think those in the mazuis are mostly amateur VAs who just happen to be Touhou fans, and Sound Holic most likely used their singers to voice the girls in their fan-anime. So other than they are both maids and serious about their work, I can't place anything in common.
Unless of course you add in the fact that the masters of their mansions have a pitiful ches- (knifed and burned)