For fairly long time I have been using Samsung tab. Some times back I shifted myself entirely into Apple ecosystem. Now i need a tab which is portable, so the Mini. I will be needing it fairly for reading a lots of PDFs and CHM Files as most of my medical books are in that format and random clicks of few slides and specimens for my study purpose. Also it should have a great battery life too. Now the question is should I buy Mini 2 or wait for Mini 4? I know the hardware differences are a lot but will Mini 2 be able to run all those PDFs and CHMs smoothly? The price difference between 32GB iPad Mini 2 and 64GB iPad Mini 4 is close to about Rs 10,000 (200 dollars) in India. So, is it worth to buy Mini 4 solely for those purposes?