I can’t answer that question exactly, but I will say that they are built for different reasons.

Inkscape is an excellent vector tool

Krita has been built from the start to be a drawing, painting illustration tool

Gimp is an image manipulation tool.

Naturally they have features that cross over with one another but they are each the best at their specific goal

Steam Controller really comes into it’s own when you rely on both touchpads.

I usually map the left joystick to the left touchpad on touch, and if I need options for the D-pad map them to the joysticks instead or even touchpad 4 button click.

For side scrolling platformers I just map the D Pad to the left touchpad on touch, and ABXY to the right touchpad on touch.