I think it is worth it just to get the choice of cabin location - of course it depends how much it is though.
Choice of cabin location is a personal thing. Most places seem to say to have one with cabins above and below as it’s quieter than having a bar etc. underneath. If you have a forward or aft one you can end up a long way away from things but I’ve never found that a problem. Higher up cabins have a bit more movement if the sea is rough but again, never found it a problem.