When we take a look at HTML5 compatibility however, Internet Explorer 10 seems to be behind. According to WPCentral the iPhone still beats Windows Phone 8 in the HTML5 features it supports via a test from HTML5Test.com.
One area though that IE10 seems to be behind ever so slightly is HTML5 compatibility and specifications… In this regard, IE10 on Windows Phone 8 [scored] 300 plus 6 Bonus points (awarded for audio-video support not specified). That is out of a possible 500 points plus 15 Bonus points. Android 4.0 (Ice Cream Sandwich) gets a score of 280 + 3 Bonus points while Apple’s iOS 6 browser gets an impressive 360 + 9 Bonus points.
Once Windows Phone 8 is released and iOS 6 for the iPhone it will be interesting to see which browser comes out on top in a real world comparison. Of course one cannot forget about Android 4.1 Jelly Bean either, which would be just as interesting to pair Windows Phone 8 up against.