Both FujiFilm AV250 and Fujifilm Z1000EXR have 16.0 MP resolution sensors but FujiFilm AV250's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Fujifilm Z1000EXR's sensor is 1/2-inch (6.4 x 4.8 mm ).
Since Fujifilm Z1000EXR's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to FujiFilm AV250.
Below you can see the AV250 and Z1000EXR sensor size comparison.
Sensor Size and Resolution Comparison image of FujiFilm AV250 and Fujifilm Z1000EXR Cameras
FujiFilm AV250 and Fujifilm Z1000EXR have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
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 AV250
or the
Fujifilm Z1000EXR ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus 1/2-inch),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.