Canon R1 has a
24.0MP Full frame (36 x 24 mm ) sized Stacked CMOS sensor and features Digic X processor. On the other hand, Pixii Max has a
24.5MP Full frame (36 x 24 mm ) sized CMOS sensor .
One other difference between these two cameras that is worth mentioning is that Pixii Max's sensor doesn't have an anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the R1 and Max (A3410) sensor size comparison.
Sensor Size and Resolution Comparison image of Canon R1 and Pixii Max Cameras
Canon R1 and Pixii Max 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
Canon R1
or the
Pixii Max ,
including hyperfocal distance.