In terms of the Apple Pencils, there’s no difference in how well it draws. They’re the same. The difference is how they’re charged and the finish (smaller, matte vs longer, glossy).
People make a big thing as if the only way to charge the Gen 1 Apple Pencil is to plug it in the iPad’s Lightning port, but I have never done that despite using the thing every day of the week. I just bought a nice charging stand that sits on my desk.
The big thing about the iPad vs the others, to me, is the lack of laminated display in the basic iPad (unless they’ve finally changed that). I tried, but I can’t go back to a non-laminated display. Just feels weird trying to write & draw on it.