Yeah, Google Maps in Japan knows a lot more, e.g. it shows actual road widths with delimited sidewalks or it tells you about train platforms and elevators when switching lines. The data is from a third party (ZENRIN, check the bottom of the screen) that provides an insane level of detail. Yahoo uses them, too, but Apple doesn't.
Ah. So it's not a question of Google having to assemble better data to compete with (insert other provider), it's a question of having local agencies that are much more proactive about assembling and maintaining accurate data than Google would be.
