I am part owner of an established startup doing mobile games aimed at kids. The decision to support Android was always a contentious one for us, and after years of beating our heads against that wall, I wish we had never done it.
I won't get into value judgments or rhetoric about openness - the revenue on Android just isn't even faintly close to iOS. Maybe 20 cents on the dollar on a *good* day. But as you might guess, it's taken up a lot more than 20% of our time. This fact is sometimes presented with undertones that iOS developers are just greedy, but it's literally a matter of survival - for us, Android simply cannot sustain a viable business.
As far as ease of development: the other comments capture it pretty well; both platforms have a lot of annoyances that you have to work around. Compared to my background developing server applications on Linux, I find both platforms shamefully bug-ridden and slapped together, but I wouldn't say that one is noticeably worse in the big picture.