The English dub has an extra narration at the beginning that isn't present in the original Japanese version.
Shun Kazama:
There's no future for people who worship the future, and forget the past.
Although the movie takes place in the early 1960s, the "Coke" sign over the store (at around 6 mins) has a swoosh. That didn't become part of the Coca-Cola logo until 1969.
When Umi and Shun board the ship to find out the truth about their parentage, there is a shot that shows a red sign saying "Ghibli" on the front of the ship.
The American version of the film has an additional tag for the end credits, listing the creators of the English dub. The style is completely different from the rest of the credits and the music is an English version of "The Indigo Waves", the choral song from the end of the film.
Japanese
$22,000,000 (estimated)
$57,585 17 March 2013
$1,002,895
$61,487,846