@TrickDacy Krita is for Digital Painting, GIMP stands for GNU Image Manipulation Program, Krita is intended for Digital Painting, GIMP is intended for Photo editing.
GIMP is lighter than Krita in terms of resource usage, Krita requires at least 4GB of RAM to work, although i tested it with 2GB VM, which made it a little sluggish.
For more concrete comparision here's a Youtube video on Invidious (The video is 3 years old but it can help)
Edit: Typo
@TrickDacy No problem, and keep in mind, you can have both if you desire.