GoPro Hero7 Silver has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor . On the other hand, GoPro Hero6 Black has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor and features GP1 processor.
Below you can see the Hero7 Silver and Hero6 Black sensor size comparison.
Sensor Size and Resolution Comparison image of GoPro Hero7 Silver and GoPro Hero6 Black Cameras
GoPro Hero7 Silver and GoPro Hero6 Black 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
GoPro Hero7 Silver
or the
GoPro Hero6 Black ,
including hyperfocal distance.