Neither of the existing models gives actually passable production-quality results, be it MJ or SD or whatever else. It will be quite some time until they get out of the uncanny valley.
> There's a reason like 99% of ai art comic creators stick to Midjourney
They aren't. MJ is mostly used by people without experience, think a journalist who needs a picture for an article. Which is great and it's what makes them good money.
As a matter of fact (I work with artists), for all the surface-visible hate AI art gets in the artist community, many actual artists are using it more and more to automate certain mundane parts of their job to save time, and this is not MJ or Dall-E.