They are basically the same camera in terms of practical use, the Leica body style feels a bit better quality but it doesn't have the rubber grip that is on the LXs. As for photo quality no difference they both have the same sensor ans have the same aspect ratios via the switch on the lens. I'd say apart from the branding/style there are no differences in use. I took the rubber grip off my LX100 and fixed it to my D-Lux (wish Leica had provided this as an option) my daughter still uses my old LX and loves it. For a walkabout compact camera you can't go wrong with either, the newer variants have more megapixels but on the M4/3 sensor I'm not sure they make for significantly better IQ.