"Now that is a smartphone," admits Siri as the comparison ends in the latest Windows Phone 8.1 commercial promoted by Microsoft. Pitting the Apple’s Siri digital assistant against the newly unveiled Cortana in Windows Phone 8.1, the advertisement shows how an iPhone 5S pitted against a low-end Lumia 635 fairs as Cortana handles location-based reminders, along with traffic alerts which Siri is not able to do. Do enjoy the "Siri vs. Cortana - Happy Anniversary" commercial shared below.