Hmm, according to Wikipedia...

Iowa-class battleships:

45,000 tons (standard)
52,000 tons (war service)
57,000 tons (pre-1980 full load)
58,000 tons (post-1980 full load)

Yamato-class battleship Musashi:

69,300 tons (normal)
74,000 tons (full load)

So I guess Musashi ought to be a lot larger? :D

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