Navigation

There is one obvious advantage that Voice Actions has over Siri and that's . Voice Actions is integrated with Android's Google Maps app that includes free turn-by-turn directions (U.S. only). All you have to say is something like "Navigate to 501 Second Street in San Francisco," and as long as your phone understands you, you'll be on your way with Android's voice-guided navigation.

Apple doesn't offer a Siri-enabled turn-by-turn navigation app for the iPhone, although you can get directions from Google Maps (sans voice guidance). Android has the advantage for navigation at the moment, but this may change if Apple opens up Siri integration to third-party apps.

Google's Got The 411

Apple says Siri can draw local business information from sources such as Yelp, but Siri can't call a business directly unless you have the number in your contacts database. Voice Actions, on the other hand, can go online for you, do a business search, extract the phone number, and automatically dial it for you.