So ... in order to prove or disprove the switch theory, all we need is a good close up detailed shot of Titanic's main beam number. I have no idea if this number still survives or was destroyed in the sinking.
I am not sure you know what you are talking about.
Since either ship is no longer around this may just be an endless debate.
There is no debate only the people who can not accept the facts are always coming up with the switch fantasy.