What is the difference between aniline, semi-anline, and pull up leather? And how do you tell if it's pigmented or non-pigmented?

And which is the Pottery Barn Burnished Saddle?

There is a picture of the description below that says "semi-aniline". I don't know what that means, and if it is pigmented or not. I have read other posts on houzz that say it is pull-up leather but I am not sure how to tell the type of leather.

I am trying to purchase the best care/repair kit to have on hand to rub out the inevitable scratches.

There is scratch remover for aniline leather. (use only on non-pigmented)

https://www.mohawk-finishing.com/products/leather-touch-up-repair/leather-repair/scratch-remover/

There is pull-up leather repair kit for pull-up leather.

https://www.mohawk-finishing.com/products/leather-care-maintenance/leather-care-maintenance/pull-up-revive/

I don't know which is the more appropriate to use on this type of leather