all the basic things the iphone can do, it does it much better. mobile safari might not be the best but i have a better experience with it than most android browsers. actually, chrome for iOS seems A LOT better than on android also. i dont even use it on android whereas its my main browser on my ipad.
bitesms is the best messaging app. i miss it. a lot. there are some that try to be like it on android but none of them are as good as bite sms.
my personal opinion is that, yes, in most cases, android can do more and has more customization, but what iOS can do, it does it SOOOO much better and smoother.
and in terms of jailbreaking and rooting, i think its better on the iphone too. so many more tweaks and stuff and almost all are compaitble with the iphone. for android, installing a rom is about as far as it goes. there are some mods here and there but they do not really change the way you iteract with your phone as much.
apps on play store seriously just arent built as good as on the app store.
but i do not regret getting a one x. its fun to learn and play with a new device and new ecosystem