There are a couple of things to consider.
- Would you be supporting this in a corporate environment?
- How familiar are you with either already?
In my experience, they are very similar in the sense that neither has changed much since inception. Granted, icon’s change and apps are added but overall, the root filesystems of each are pretty cut and dry. I would suggest visiting The Android Development Center and the Apple IOS Development Center. From either of these, you can download (for free) the lateset operating systems in a development environment. This includes simulators etc…
That way, you can navigate and poke around a bit.