On the SWISS website (and of course on my little ZRH site showed in the profile), you will see a list of all MD11, A340 and their names they will carry. You will see, that all A343 have the same names, as the MD11. So, it's a good guess, that the 12 A343 will replace the 12 remaining MD11 on a one-to-one basis.
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment