Both Canon M100 and Canon M3 have APS-C sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the M100 and M3 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon M100 and Canon M3 Cameras
Canon M100 and Canon M3 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.
DxOMark Sensor Scores
Both Canon M100 and Canon M3 sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, M100 has scored 79, 7 points higher than M3.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon M100
79
23.5 bits
13.0 Evs
1272 ISO
Canon M3
72
22.8 bits
11.8 Evs
1169 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Canon M100
or the
Canon M3 ,
including hyperfocal distance.
