Olympus SZ-10 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features TruePic III+ processor. On the other hand, Canon SX270 HS has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Digic 6 processor.
Below you can see the SZ-10 and SX270 HS sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus SZ-10 and Canon SX270 HS Cameras
Olympus SZ-10 and Canon SX270 HS 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.
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
Olympus SZ-10
or the
Canon SX270 HS ,
including hyperfocal distance.