interesting. i had assumed the 82 mm to perform better due to the higher rof and lower scatter / huge hitbox of the target.
The 82mm perform better cause it's more efficient. The only question you have to make yourself is:
-Does the 20 extra range is gonna allow me to do something the normal mortar wouldn't allow me? Say parking it up behind a house and attacking someone who foolishly still tries to forward the medic HQ way to recklessly.
-How much micro can you allow yourself to spend in using mortars. Reminder that mortars are not as good on autofire and require the usage of barrage for them to be really good. All their vet doesn't provide any direct benefit towards auto attack or attack ground.
NEVER build 2 of them. At 340mp and 9pop it's not worth unless you are in a team game and you can rely on your partners to cover for your investment.
If you found yourself not microing mortars, it might be better than the 82mm due to the extra range. Because even if the 82mm will fire more shells more accurately, if it's not firing at all it is not gonna be doing shit.