There are early photo so it may have changed but they are marked "Behringer Control CPU" on both boards so I can't see why they are not swappable.
As you have the both in front of you have a look.
Check the voltages (start with the supply) on both boards.
If they are the different open another unit and check to see which one is correct.
Swap the eeprom and hope that the eeprom isn't also damaged.
All the best
Royce