Comparison of Apple iOS and Windows 8 [Video]
Here is an in-depth comparison of the Apple iOS on iPad and Windows 8. The review gives comparison covering lock screen, home screen, browser, touchscreen keyboard, search etc.
Both the OS have their own benefits. iOS is kind of matured and refined. Windows 8 is still fresh and is out for a developer preview to give developers a chance to develop the apps and a headstart to them on what they can expect from the OS.
I feel, its left to the users who want to choose what they want to do with ease. Do check out the review below from winrumors.