Yes, a different reverse die, mine’s the only reverse die of its kind I’ve found so far, with that double ring of pellets around the left half of the coin.
By stable mate, I meant that the two coins were sold together in the same lot at the Wilkinson sale.
I wasn’t paying attention, I thought both the tickets you supplied with the coin were yours. It wasn’t until this morning I realised one of them was W.W’s ticket