unfortunately, their admins said on the website that they are gonna focus on painting and raster stuff. This was a while back, but I don't think they've changed plans
Clip studio paint is great however the interface isn’t intuitive for the iPad, it’ll just act like the desktop version and the menus will get cluttered especially when you have the small iPad version like I do, also they work on a subscription base unlike the desktop version.
If you still looking, which apps is the best for you, choose Affinity. It will help you to know more in professional apps environment). Affinity i think is the second choice after Adobe apps like illustrator.
Sry but I didn’t find this very helpful, because you mentioned very different aspects of every app, that didn’t really help to compare them properly (what they can’t do for example). Also I’m not exactly sure which ones of them are for free and which aren’t (except the adobe one). Otherwise it was a good overview.