@popolon GIMP stands for Gnu Image Manipulation Program, so I've recently started using the abbreviation as GnuIMP as suggested by other mastodon artists.
I did try the Glimpse fork briefly and there isn't a whole lot of difference I think. https://glimpse-editor.github.io/
I think Krita has a more advanced brush engine than GnuIMP. I mainly just draw instead of paint so either program works fine. I like the Krita UI best, and its color labelled palette!
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