Everything I've ever heard, including in this thread, says that iOS and its apps are still way ahead of Android and its apps in accessibility. I'm not very personally familiar with the accessibility on either so I can't say, but I'd be surprised if this has changed as radically as you say.
you should do some research then. for a blind person, IOS7 is unusable. while recent samsungs are almost fine... though i hate pretty much everything samsung did with android, the accessibility stuff was ok.
There are tons of blind and vision-impaired users using iOS 7 and a quick web search shows articles praising the improvements for those users. No doubt there are vision-impaired users who don't like it, too, but it's silly to make a blanket statement that it's unusable.