Second on Manga Studio/Clip Studio Paint. Keep in mind it’s a bit of a quirky tool it takes a bit of getting used to in order to get the most out of it. As far as I know, it cannot import or export vector files. Though strangely it has some support for 3D import.
I find I needed to spend quite a bit of time to setup my brushes so they don’t have a manga style. Sketchbook is really good at giving you “ID” feeling tools out of the box comparatively (realistic pens and most importantly really good markers).
One of the small but really useful feature for me is the ability in Windows to completely turn off non-pen inputs on the canvas on my Surface Pro. No more random marks from my palm, finger inputs that were meant to move the canvas that get recognized as a brush stroke…