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I use both apps and Ive seen artist create equally amazing artwork out of both-

Knowing the programs:

Procreate has a more simplistic layout geared towards sketching. You can easily adjust brush size and pressure on the side. What I enjoy most about procreate is the unique brushes (as well as making my own brushes) and of course the instant play back video which you can easily upload your progress on sites-

Pros:
-Clean simple layout
-Large amount of unique brushes
-Playback video
-Good pressure sensitivity

Cons-
-Hard to find some tools like layer opacity
-No shape tools/text
-Only for ipad/iphone
-Cost around 5.99$

MedibangPaint feels more like an actual pc program than an app- it has a lot of unique tools to help create shapes, screen tones, paneling, and even text.

Pros-
-Good for editing
-Really good features for comic and manga making
-Available on pc, apple products, and android.
-Available free

Cons-
-Confusing load/save functions
-Hard to find a lot of tools
-Messy layout
-Simple brushes

My recommendation is (if possible) use both apps. Each app offers something a little different that the other lacks- I typically use Procreate to draw/color and MedibangPaint to edit/add shape/text.