Give it a try, but research shows that the iOS devices are much better at accessibility.
On my campus we have "The Research Center for Persons with Disabilities," and they overwhelmingly advocate for iOS devices (iPad / iPhone). The difference is that iOS has the accessibility built into the OS, where under Android, it's up to the apps to support it. Things like Voice-Over, temporary speech, high-contrast mode, zoom, etc. are all OS level functions and don't rely on a single app to provide the feedback. On Android there are accessibility "hooks" that are pretty much only used by Google -- and if you don't have an ASOP device the addons that the hardware partners put in rarely make use of them (meaning some dialog boxes will do speech, some wont. Some critical apps will, some won't).
For e-books there are apps like Voice Dream (again, iOS), that come highly recommended. Essentially, it turns the book reading experience into something like iTunes -- you can scrub through the file, read it back faster,slower etc. It also highlights the words it is trying to pronounce so that if you run across a technical word that isn't commonly annunciated properly, you can zoom in and read it for yourself.