Maggie, wonderful color in your pictures above. I sold my M9-P and MM to a dealer in Bangkok at a little more than the going price in the States and ordered an M10 in Paris, where I am now but, as it hasn't arrived yet, I cannot say anything from personal experience. My decision was based on a discussion with a very good professional photographer, whose colors sense and work are superb.
His impression is that the M10 is operationally night and day from the M9, and that it feels like the Leica M that we all wanted when the M8 was released. His feeling is that with a few adjustments in Lightroom one can get pretty close to the M9 look — though he thinks that there may still be something inexplicably special about that look. He feels that, compared to the M9, the M10 sensor is almost too good, in that it can have something of a homogenizing effect. He said that the M9 was a challenge, especially in low light, but sometimes challenges pay off in better images, like using film. He feels that probably with the M10 one may have to "rough up" the image somewhat.
Also, he thinks that the M10 B&W conversions look very good, though it seems that the MM may be a little better, but again, depending on post-processing, it could really be splitting hairs. For my work, the superiority of the MM over the M9 was not really important because I was never after the "exquisite" look that the MM can give.
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Alone in Bangkok essay on BURN Magazine