Siri vs Google Voice Search
Yeah, Siri has a few neat features like being able to call you "Rock God" or whatever, but, overall, Siri seems to rely more on having a personality and being a personal assistant rather than being a reliable search platform. For that, I'm happy with Google Voice Search, even though it doesn't have a catchy name. Not only is Google Voice Search faster, more reliable and better looking than Siri, but it's funnier too. I asked it what my name was and Google Voice Search returned a list of amnesia links. Siri asked me what I wanted to be called.
I doubt that anyone is going to base their decision on buying an iPhone or an Android device based solely upon the comparisons of Siri vs Google Voice Search now. But, if you'd like a quick and easy way to ferret out the differences between them, you can look at it this way: Choose Siri if you want a personal assistant. Choose Google Voice Search if you want reliable results. Me, I want reliable results, so the choice is clear. I'm going with Google Now and Google Voice Search. And, if I want to be called "Rock God", I'll just ask my girlfriend to do it.