You and I must using very different versions of Windows on a tablet my friend. I have a Samsung Tab Pro S. I’m admittedly not a fan of Windows as a desktop OS but could cope if I had to use it. Strictly as a tablet however it’s a terrible experience. The iPad app ecosystem far exceeds Window’s—I’d choose to use nearly any iPad app counterpart to its Windows version when using it purely as a tablet. Navigation by touch on an iPad is far more fluid and apps are optimized for touch. I find trying to use desktop apps on a tablet clunky at best—far too few work well in this fashion.
Again, I’m strictly speaking about using it as a tablet—held in your hands and navigating solely by touch. If someone is looking to purchase a single device for all of their computing needs and tends to lean more towards the desktop/laptop, I’d suggest they consider a Surface Pro (but not rule out an iPP). Conversely, if they skew towards a tablet, I personally think the iPad is a much better experience.
Let me preface this by saying this is my own opinion, and not meant to disparage how you use and prefer your tablet. Both of our methods are valid simply because we each prefer them. I only mean to provide insight as to my thought process.
I much prefer windows programs to ios apps for many functions. I do find that in "dumb tablet" use Windows has all the bases covered such as music, videos, pictures, email, calendar, etc etc and don't find anything on iOS more compelling other than possibly personal preference. If anything Windows apps have very nice layers to them where you can do basis stuff, but can peel the layers back for more advanced function. If you want to even take it a step further you can go super advanced, but have to give up some touch functionality. For example, Windows email app is very robust and does everything a simple email app should do, you can peel some layers back and it does provide some more advanced functionality. You can also go to the other end of the spectrum and install Microsoft Outlook, which would provide the absolute most advanced functionality at the cost of touch ability. Although I've always wondered at the ability to touch through legacy windows programs and in my personal opinion feel that the difficulty is VERY overhyped. I suppose if you are checking your email one handed on a crowded moving subway train you might find a huge red stop and a huge green go button works well in your apps, but I've never been partial to this dumbification, but I don't use my tablet this way. Microsoft has gone a very long way to make many of its legacy apps touch friendly, the Office suite has been really revamped and you can opt for larger buttons in the ribbon. Adobe has revamped legacy programs like photoshop as well, as have many others.
Some time ago I challenged users on here to find me apps which are not represented on windows ecosystem, whether it's web apps, web pages, apps, or legacy programs. I didn't really get any answers. There are certain cases where user preference may skew one way or another, or the way a tablet is used (such as touch ability versus advanced features). But regardless of those user preferences the fact is that virtually everything iOS has in its ecosystem Windows can match it, and exceed it in many cases. I personally don't think that ecosystem argument has been valid for a few years now.
I also find navigation on a windows tablet much more elegant than iOS, once again just me. Many functions on an ipad are just glorified overblown iPhone features. Take the control panel as an example and the lack of customization, or ability to even shortcut to settings. Contrast that with Windows action center which lets you customize, right click to settings, and has very very good notification options, all at a swipe of the finger. Just one feature out of many I prefer on windows. Multi windows with snapping, oh the glory of snapping 4 windows at once. Resizing multiple windows. Multiple desktops. I could go on. You also can't beat how customizable Windows is. I have one app called TouchMe gesture studio that allows me to make custom gestures, so I can turn the volume up/down by putting 3 fingers on the screen and twisting either way, I can make my browser full screen by 3 finger swipe up and call my favorites with 3 finger swipe down, change brightness, etc etc. Don't even get me started on things like Fences, Stardock's Windowsblinds, Live tiles, how about Dynamic Themes? There are just way too many to list, but I suppose many prefer just a static grid of boring icons year after year.
But once again if we just compare "dumb tablet" features I don't see the advantage of iOS, except battery life. Anything else on Windows you should simply consider gravy, extra stuff you get that you can choose to completely ignore. But as I've posted before, I cannot downplay the HUGE importance of battery life and on that front the ipad trounces the surface tablets and is certainly a very valid reason to choose one if you can live within the limited iOS ecosystem.
Lastly, I don't want to leave out hardware features as making the surface a better tablet, markedly so IMO. The kickstand is phenomenal, so much that I wonder how other tablets exist without one. The ability to have a naked tablet and be able to prop it up in front of me to watch something, or prop it up to draw/write on are indispensable, as are using it in bed or on the go otherwise. And no, I don't consider the floppy POS that Apple sells as an addon anywhere near the functionality. I also prefer the surface keyboard over the ipad one, much better.
Once again, this is just how I use my tablet. The IPP is a very nice tablet, and one that has the HUGE advantage of much better battery life. I don't blame anyone for preferring it, I just get riled up when others say that Windows on a tablet isn't as good.