Hello, I wish to give an Apple companion to my iMac instead of my old Galaxy Tab 3 (that works like a charm by the way but is very much an Android device with all its bizarre things). My point is: the Mini 4 caught my attention cause iOS9 comes preinstalled. I like that. But after reading all the posts, seems that I should not elude the question being "Maybe I should buy an Air 2 instead". What tickles me is the fact that an Air 2 would come with iOS 8 and I would have to upgrade. Is there a difference between a preinstalled OS and one that is installed by upgrading. I mean microscopic bits and pieces. To me, a Mini 4 with preinstalled iOS 9 is like wiping clean the disk before installing a new system. Am I wrong? Is this important before making the decision to buy one or the other? After that, I'll probably feel for an iPhone. Yep, stuck with an HTC now. Thanks for giving me cues. Racineur in Montréal.