I want buy an iPad only for taking handwrinting notes in the university lessons. I'm not an artist, so I don't draw. Is better iPad air 2+Adonit Pixel stylus or iPad pro+Pencil?
My honest opinion would be iPad Pro 9.7 with Pencil. It's not as expensive as the 12" iPad Pro and works just as well. The reason I would recommend the Pro and Pencil is that the Pencil works so much better especially for handwriting. There is almost zero lag.