Yes, but the advantage is that the user sends their own public keys and they can switch it freely (and preferably easily, user click "login", a window pop up, u

Yes, but the advantage is that the user sends their own public keys and they can switch it freely (and preferably easily, user click "login", a window pop up, user select a public key, done) at will. While client certificates is currently managed fully by the browser, and you need to adjust your HTTPS infrastructure in order to enable the feature.