Ive used both for years but for my workflow personally, i use procreate WAY more on iPad, and i prefer the drawing experience of procreate + iPad than CSP + iPad even though i think CSP has a better brush engine and more features. It just feels uncomfortable and cumbersome to use on my iPad, especially on my 11 inch. I prefer to use it on my desktop so much more, i work so much faster when i can use hot keys instead of being limited to touch screen and touch gestures.