Who benefits from swapping Bismarck and Yamato?

Which navy benefits more from swapping Bismarck and Tirpitz with Yamato and Musashi?

Germany probably benefits more, while Japan loses the exceptional gun power and numerical-offset role that lay behind the Yamato design.

German docks, logistics, and supporting infrastructure would struggle with Yamato-sized ships, but Germany at least gains formidable combat power. Britain would likely accelerate the Lion class or revive very large-gun studies in response. Japan loses much more because Bismarck has fewer and smaller guns despite somewhat greater speed and range. Her 15-inch battery cannot fulfil Yamato's intended role of allowing two Japanese ships to counter four American treaty battleships.