I just got out my 3 styluses to test. I originally bought them to use on my iPad Air and was satisfied with all 3 in different ways. My experience on the mini 4 is different. The Adonit Jot Touch 4, the one with the clear plastic disk, is consistently excellent on both devices. The Bamboo generation 3, the passive stylus with carbon nib, has an excellent feel on both devices. The one I'm not happy with is the Wacom intuos creative 1. I loved the way the rubber nib felt on the Air, with just the slightest bit of drag so it wasn't too slick. Now on the iPad mini 4 there's so much drag the stylus is uncomfortable to use.