This video shows the BlackBerry Dev Alpha B running BlackBerry 10 OS and the iPhone 5 running iOS 6. The Dev Alpha B had an OS version of 10.0.9.1103. It was running mobile hotspot that was coming from a Bold 9900. Both were on Fido (3G). Check out the video below so you can see the browser comparison yourself:
Source: NerdBerry via GadgetMasters