According to Browsemark scores, Internet explorer 11 will pack significantly more punch than Internet explorer 10 in terms of performance. The avg score for IE11 on Lumia 1520 is 2745, while for IE10 on Lumia 1520 is 1921. This is an improvement of around 45%. If all this converts into real-life performance improvement, then IE11 should be a killer browser, as IE10 wins over iPhone 5S browser easily in real-life tests.
You can watch the Internet explorer 11’s leaked demo by clicking here. If you want read all the changes and features Windows Phone 8.1 brings no better place than our Windows Phone 8.1 page.
Thanks YS for the tip. Cheers!!