I am coming from a Windows Phone to iOS, I just got an iPhone 5S two weeks ago. The Nokia was a 920, by the way. Here is my opinion on the matter: -The Metro UI is actually BETTER! This is the best UI on the market right now. It seems like small things like deleting text messages, contacts, etc. are just common sense on a Windows Phone whereas on an iPhone they aren't. I'm not saying iOS 7 is BAD, as I think it has more attention to detail than a lot of Android UIs, but Metro is just better. -The web browsing experience is a lot better than Windows Phone. I am comparing stock web browsers here. iOS's Safari is faster, renders websites better, and has better features. -Navigation... equal, until you get poor reception. I didn't notice a difference in quality until I was driving in the country and my iPhone's navigation app went funky, whereas with Nokia's stock offline maps app would have had no problem. -Apps - to me, equal. I am not an App maniac. I download maybe 6-7 apps that I use consistently, and leave it at that. Windows Phone has all the apps I need, iOS does too. I think a lot of people blow the app argument out of proportion. Windows App Store is solid nowadays. -Cases - this is one thing that kinda irks me about any other phone besides the big sellers (iPhone, Galaxy, etc.)... lack of choice when it comes to cases. I got a Lifeproof Nuud and love it. There's maybe 4-5 cases, a lot of them junk, for any Nokia model. -Hardware - Not going to compare specs or anything, just the feel of the industrial design. Nokia focuses on having an inviting-looking phone, whereas Apple focuses on having an industrial, sleek looking phone. I prefer Nokia's industrial design language, but I don't like the way they use glossy plastic on a lot of their phones. Both are comfortable to hold. -Battery life - iPhone crushes it, no doubt. This is one of Windows Phone's weak suits, as their phones usually run last-gen or mid-tier cpus that perform great since the OS is so optimized, but usually take a lot of battery life. -Overall: I would say my experience has IMPROVED since going to the iPhone, with the addition of more battery life and better web browsing, but I would take Nokia back in a heartbeat for my next phone if they have a good phone out when my contract ends. Nokia and Windows Phone has a lot to offer, their biggest weakness I would say is the lack of using current gen CPUs... besides the 1520 (which is way too big in my opinion)... even the Lumia 1020 uses last gen, mid range CPUs although most reviewers say that the camera app is sometimes slow. This boggles my mind and was the deciding factor when it came down to choosing between these two companies.