The nekos look pretty much the same in all the stockings/socks. Either their paws are sticking out or not.

socks stockings neko atsume

They look the same in all the pails/pots.

pots pails neko atsume

The normal cats sleep in the earthenware pot, aluminium bowl and fruit basket in the same way.

basket earthenware pot neko atsumealuminium pot

You should get:

Special items: earthenware pot (Nabeneko San / Chairman Meow)

1 sock, 1 pail