Krita is better in any conceivable way.
GIMP is the only image program I have seen on Linux that shows a preview when printing, and it lets the user freely scale the image to get the desired size on paper.
GIMP is perfect for my workflow. Simple tasks like resizing selected regions is a chore with Krita. And did I mention that GIMP is scriptable? I've been using GIMP professionally since 2008.
Nice.