As it stands, yes, the concept is similar. However, there is still a niche that 3rd fits into that 5th or the [LN] will likely not. 3rd's plans going forward are to expand on what was constructed during the unofficial phase, and focus on what we can do to better deal with the conflicts Liberty is dealing with. [LN] in my eyes focuses on everything evenly, while 5th is a more reserved bunch. The intentions here is to expand on the war effort, focus on the front and bring even closer ties to not just factions that are already allies, but likely bring in more mutual aids to deal with the Gallic Conflict.
As I've said before. Just because it's been done before (twice in this case) doesn't mean that it will always be the same. 5th itself is evident of that fact.