-The histogram shots are from the DNG RAW files in faststone image viewer before conversion in RPP, Photoshop cannot open RAW files... you need acr.
-The M10 shot is properly exposed and processed... the clouds look sharpened.
-The M9 shot is overexposed and the f stop number omitted from the EXIF data.
-RPP knows very well how to deal with M9 RAW files, its an old camera and M9 users love RPP. RPP should have a problem with M10, but it does not seem to be the case here.
From a suspicious perspective, something stinks in these two shots but even despite all the "suspiciousness", the M9 still looks 'better' imo.