Yes, it's true in general.
Tokyo's parks have unique attractions, but the ones which are similar are usually "plussed" or are just in better shape than their counterparts.
Pooh's Hunny Hunt can't even be compared to the stateside versions, it's completely different and much better.
Splash Mountain is much better, POTC is like the Anaheim version, Space Mountain has the upgraded effects like Anaheim plus an upgraded queue....but no music was added.
Monster's Inc. is also unique to Tokyo and not like other attractions.
Indiana Jones and the Temple of the Crystal Skull is an upgraded version of the one in Anaheim.
Haunted Mansion has some unique effects that I enjoyed.
Tower of Terror follows an entirely unique plot without the Twilight Zone theme, and is very well done.
I could go on and on....lol