At a wedding party I was talking with another Nikon photographers, who had mounted the original part of Nikon D80 under his. At some point we have the original (Nikon MB-D80) and the "copy" (Product name Phottix BP-D80 is the way) compared.
Result: We found no difference ... all the same (!): The dimensions, appearance, even the screws that hold the handle, are exactly the same size and in the same position!
If you had changed the rating plate, then the device 100% would have been identical.
Also functionally no difference was evident.
Why then pay 25-45 EUR more and then still buy two extra batteries? Hmmmm ... This reminds me now of anything!