Ipad Pro & Ipad 2018

One question, I think, between Pro 2018 11" and Ipad 2018. Most of all I need a tablet for learning, for example, to make notes in PDF documents (educational magazines and workbooks). But, I also work with graphics, mainly on powerful laptops and stationary PCs that require so much more resources to work, and I don’t know if I need Pro 2018 11" for work — a strange question, because I have never used the tablet in this way) but if I take the iPad 2018 for the growth of my old Samsung Galaxy Tab S LTE, it will be much more powerful and support for the Apple Pencil, which for me is the main reason for replacing

Please help make the right choose!