If he could hit them, then yes, then it´s the same as with Itachi. But just because one has something doesn´t mean it´ll guarantee success of course. Such artifacts only matter if you´ve got the chance to make use of them, and unless you stab the Totsuka-no-Tsurugi into something for a short period of time then the sealing effect won´t appear. Just slash at something and it´s just a really sharp and dangerous weapon like the other Susano'o weapons are. I would like to see how Obito's current attack jutsu would react with the Yata no Kagami of course too.