I tried to look up the gripmunk but they have different styles. So IDK which one you meant.
I wouldn’t say this like a super slim case but it’s not like otterbox or urban armor gear nonsense. I’m a guy that wears jeans so I can put it in a pocket no problem. So it isn’t huge and cumbersome but it’s not like girl jeans fake pocket slim heh. I tried to get some pics that show the amount of thickness and extra bezel it adds. I measured and it looks like it adds maybe 2mm all the way around.
If you wanted to wait the PhoneRebel cases will be finished for the 16 sooner or later. Those are decent, more slim, and come with a free glass screen protector. Magnet isn’t as good but it’s decent.