Yeah, they are different things and probably it should be removed on OP's poll. Bitcoin mixer services are different into Bitcoin Coinjoin wallets but they had almost the same effective mixing service that provides additional privacy for everybody and preferable for bitcoin mixing solution.

It's my bad, all I know is the Sudoku wallet is also with a Coinjoin mechanism integration, it means can make a transaction has privacy and anonymity. Aside from Wasabi and Samourai wallet are also with Coinjoin.