I purchased the black leather case a few days ago. Since I'm working from home currently, I felt the Otterbox Symmetry was just too much when I'm just sitting in the house all day. So once I'm back in the office, I'll start to phase it into my daily use.
I've noticed the leather on the black leather case is extremely soft. It doesn't take much to make an imprint and leave a mark on the case. Like I can press my fingernail in it, and it'll leave a small dent in the leather. However, the leather on the brown case is much firmer, and takes more effort to leave a mark.