Fujifilm XP120 has a
16.0MP (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Olympus TG-6 has a
12.0MP (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features TruePic VIII processor.
Below you can see the XP120 and TG-6 sensor size comparison.
Sensor Size and Resolution Comparison image of Fujifilm XP120 and Olympus TG-6 Cameras
Fujifilm XP120 and Olympus TG-6 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. On the other hand, since Olympus TG-6 has 32% larger pixel area (2.34µm 2 vs 1.76µm 2 ) compared to Fujifilm XP120, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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
Fujifilm XP120
or the
Olympus TG-6 ,
including hyperfocal distance.