Edit 2024: This is probably still the case although since they introduced a subscription pricing model I stopped using it and started using Adobe Photoshop CC instead since it wasn’t much more expensive for the basic Photoshop plan and Photoshop includes more brush sets.
Edit 2024: This is probably still the case although since they introduced a subscription pricing model I stopped using it and started using Adobe Photoshop CC instead since it wasn’t much more expensive for the basic Photoshop plan and Photoshop includes more brush sets. Clip Studio has more specialised features for comic work which is something I don’t really do anyway.