If both threads are written by you, and both the title and content are verbatim or quasi-verbatim, then they are likely going to be reported as duplicates. You could do that if they are in different languages (each within its language section), provided that they are both understandable and not simply automated translations.

The other option to interpret your question, is that you want to create a topic with the same title, and same topic as that written by someone else, but different written content. If you know that beforehand, it would be best to first ponder whether simply adding a post to the existing thread should suffice (it will depend on content, the time since the last post on thread, and so forth). If you are absolutely resolute on creating the thread, then probably making your title somewhat different would be a better idea. Nevertheless, similar topic threads in a short timespan are irritating to see (i.e. easy to see on Bitcoin Discussion), and subsequent threads may be reported for being repeated (which is a kind of spin-off from low value content I figure).

Note: I wasn’t sure if you could actually create a second thread on a given board with the exact same name as a prior thread. I did the