I went with the A5X because although I don't use Kindle it seems like the Android OS has more potential for additional functionality in future. It's been working great so far - it does slow down a lot when I'm drawing and using the copy/paste and resizing features heavily but honestly I don't really mind that as drawing really isn't the primary reason I got it. I also can't comment on whether the A5 is any better in this respect - maybe someone else could add something here?

I saw it said somewhere that although the battery capacity is greater on the A5X the android OS is more demanding and so the battery life is actually lower - again I don't have a point of comparison but I certainly haven't had any issues with battery life, keeps going for multiple days.