Photoshop vs. Illustrator

I’ve been getting some really nice results regarding detailed drawings and backgrounds in Photoshop, but good grief I’m finding it hard to create cartoon lines without looking like I’m drawing in an earthquake. Example A: The former, drawn in Photoshop and the latter drawn in my old friend, Illustrator, which I will stick with for line drawing in future because my hands are apparently the shakiest?

A brief demonstration of a line drawing in Photoshop. I *may* have exaggerated for effect here.
And this handsome beast was drawn in Illustrator.