Yea I get it, it's not dangerous or anything, it's just weird. Your pads will wear at different rates, your rotors will wear at different rates, and if on track and the brakes get re hot it seems you could get strange brake feel.Different pads in each caliper is a no, different pad sets per caliper is a yes lol.
One caliper is all oem, one caliper is all vesrah. Otherwise it would cause problems. Its very similar to having only compression in one fork and rebound in the other, everything is connected together and works as one unit in the end.
Have you been doing this for a while? What's the benefit?