Compact Body Compact body of Leica C makes it much easier to carry it with you all day.
195g This camera is so light that you can comfortably carry it around all day.
7.1X Optical Zoom 7.1X Optical Zoom of Leica C will give you a lot of flexibility considering this will be your only camera during the day.
RAW shooting capability RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.
Small 1/1.7 sensor Leica C's small sensor struggles in low light situations compared to larger sensor.