The unlock method for the Maniac difficulty was simplified in the overseas releases, only requiring to clear all songs on Trick difficulty rather than a series of inputs using two controllers.
The DJ Selection mode was removed in the overseas releases, though its selection graphics are still loaded in the main menu's VRAM. Curiously, the European release's back cover features a screenshot showing said mode's menu, fully in English, perhaps suggesting its removal was a very late decision.
The title screen's background is completely different between the Japanese and American/European releases, with the latter actually featuring Disney characters as opposed to a bland stage backdrop. Additionally, the copyright year was bumped up and had its font changed, and was placed lower in the European release to accommodate the slightly taller aspect ratio, said aspect ratio also making more of the art visible.
As the game's subtitle is different between the Japanese and American/European releases, the logo graphic in the main menu was altered as well. The Japanese graphic is in the same style as the title screen logo.
The Japanese release showed a video in the left side of the playfield during the How To Play sequence. It was replaced with a 2D animation in the American/European releases, though the video is still present in the data.
The American release removed eleven of the licensed songs present in the Japanese version and replaced them with several Konami originals. Nearly all of these Konami originals are from Dance Dance Revolution 4thMIX and its PlayStation port, except for one, which is from Dance Dance Revolution Solo BASS MIX. Below is a list of exclusive songs for each region.
Japan
US/Europe
Disco inferno
ELECTRICAL PARADE (Retro Future MIX)
I Want You Back
Johnny B. Goode
Let's Groove
Macarena
Superstition
Surfin' U.S.A.
The Bump
Twilight Zone
Vacation
B4U
HIGHER
Let the beat hit em!
Midnite Blaze
MY SUMMER LOVE
Share My Love
The aforementioned DJ Selection screenshot on the European back cover shows both Let's Groove and Surfin' U.S.A. on the music list, which could mean at least those two songs were planned to be retained in the international versions but were cut at the last minute.