Grip vs Comprehension - What's the difference?

In lang=en terms the difference between grip and comprehension

is that grip is as much as one can hold in a hand; a handful while comprehension is the totality of intensions, that is, attributes, characters, marks, properties, or qualities, that the object possesses, or else the totality of intensions that are pertinent to the context of a given discussion.

(computing) a compact syntax for generating a list in some functional programming languages