The biggest difference you could encounter is with the Eco system. Content available via Google Play may not be available via iOS. There are differences in apps of the same title. You won't be able to download and install apps not available on the official App Store (unless they are a web app).
Not sure if you are rooted but you won't have that capability without jail break when that is released.
Not trying to sway you. I carry both platforms. Chosen between the two is that difficult - I gave up trying.
