The short of it is, sort of. There are differences between the user-agent strings of the two if you really need to know. There’s was a lively discussion on this subject in the Internet Explorer forum last year where you can learn more: It’s also worth pointing out an old bit of documentation at

But it really boils down to feature detection, because the two browsers are meant to be interchangable.


  1. philk
    Posted May 4, 2013 at 9:35 am | Permalink

    It’s a bummer though, that we cannot override ir extend the UserAgent string of xhr. That makes it difficult to detect and handle js app requests in the server. Have to introduce a custom X-App header for that. Any idea why the WinRt team decided to prohibit the change of the UA?

    • Posted May 7, 2013 at 4:47 pm | Permalink

      I don’t know the reason there. I believe, though, that it’s a piece of feedback that they’ve heard from numerous places, so we’ll have to see if it’s improved in the next update.