It wouldn't be too hard to dual-boot Win10 on Apple hardware and compare them, but it might be a little awkward for Microsoft to do so officially.
In the end the user does not care which OS runs in the background, just which platform offers the best experience - in this case the longest battery time.
Safari, of course, has lots of support for ad blocking short of Apple actually doing the ad blocking itself. I suspect Safari + ad blockers would be the best option across the board (it absolutely rocks on iOS devices).