Please don't try to "get away with it" - as you coined it. Different length might be without consequences in a MidFi system in a bar or so. Maybe you could "equalize" it with some balance settings in your pre, maybe in your case the difference is in such a short range that it might be tolerable, but we are talking high end here, right? And in that field especially the little things MAKE a difference.
Good luck!
Good luck!