The impression I am getting is matching my own expierence.
I am having a silver / black, black / black and silver / brown one. I impregnated / waterproofed all of them with a leather spray once, which seems to be helping the brown one, not to pick up dirt too easily.
- The silver rim / black leather one went back after a month, the edges were already worn off after not even carrying it in my pocket. It is mostly on the desk or maybe in the car mount. Mobilefun did not want at first, but I politely was able to make my case and get it exchanged. I went for the black / black then because I thought wear would not be too visible there.
- The black rim / black leather one is my favourite, I am using it daily. As you would not or hardly see the edges wear, it is holding upo nicely. The leather on the edges is showing a little wear, which is perfectly normal and OK. I like the black look. The best feature of this one over silver or stock is the improved grip.
- The silver rim / brown leather one is my show-off one, I am using it rarely. It is holding up just fine, which is not surprising, as I am really only using it not even once per week for an evening or day.
If one would ask me, I would recommend the all black one. I understand the reasoning to go for a shinier one. I would also recommend people with ones holding up badly not to give up and calmly and politely persuade Mobilefun or Mozo to play ball. Photos will probably help a lot. Also it seems clear, that coating the plastic has its limits. The leather, on the other hand, could benefit a lot from impregnating with a normal waterproofing spray for leather. Put tape on the plastic