No, I haven't compared either of the Leica lenses to the Zeiss MP 100 f2, but I plan to get the Zeiss next year and then I will do a comparison. The Leica lenses and especially the elmarit are a lot smaller than the Zeiss MP, so even if they are not as good as the Zeiss MP (which I doubt they will be), will still be nice for some situations when I would prefer to take a smaller lens.