Hi I am planning on buying an iPad, as my iPad Air 1 is getting a bit old. I love the apple smart case which is available for the iPad 2 but sadly not for the iPad 2017 (which doesn't even have a silicone back cover from apple). The newer iPad is a bit faster right? But how major are the differences? It feels wrong to buy an older model but the case for the iPad Air 2 is really great. What do you guys think? How much better is the iPad 2017?