I'm probably one of the few people who you could describe as a Siri power user, so the API thing is BIG for me. However, one thing I noticed when using Siri on iOS 10 once the voice package downloaded is that it sounds...different. Comparing the voice of Siri on iOS 9 and iOS 10, something about Siri just sounds, higher quality. The voices are the same, but something on iOS 10 sounds different. Does anyone else get what I'm saying?