Is there a difference between having/getting etc a grasp of something and a grip on something, when you mean knowledge/understanding?
Merriam Webster defines grip , in this sense, as "mental grasp", which makes pinpointing any difference, if there is one, even harder.
A few examples:
- can't seem to get a grip on calculus (Webster)
- a remarkable grasp of the subject (Webster)
- Her grasp of the issues was impressive; Steve has a good grasp of the European legal system; We're still trying to get a grasp on the situation. (Longman)
- I’m just trying to get a grip on what’s happening; She was losing her grip on reality. (Longman)