I have a Samsung Galaxy Tab S2, when I purchased it last year it was the fastest tablet on the market and can still give any iPad a very long run for it's money. As regards to development it is cheaper to design for Android than it is for Apple. an Individual developer account for Apple is about $99 per year, a company developer account starts at $300 per seat per year, again apple thinking about how much money they can screw out of joe public. An Android developer account is about $20 per year. I have been a software developer for over thirty years, developing for Windows, Linux, Apple and Android. There are a lot more development hoops to jump through for Apple than there is for Android. If you are talking about the "Software Development Life Cycle" then it does not mater what operating system you develop for as the costs are the same. I much prefer to design and code for Android than Apple.