I don't think that publishing the same (exact) post twice (regardless of which account published each post or when each of the posts was published) is a good idea, because you might attract the attention of downvoters and be accused of reward farming (especially if your posts get significant upvotes), unless you decline payout on one or more of those posts. 😰

Personally, it is okay for me to see double posts like that, especially if they are not done a lot. 🙂