The plot-dialogues of the Story mode and the final epilogues were excluded from the North American and European versions.
The original Japanese cover art to Dead Dance/Tuff E Nuff is taken from a issue cover of the UK gaming magazine, Computer and Video Games. CVG created the artwork for their preview feature as there was none available at the time. Jaleco were so impressed with the design, they asked CVG to make it the official artwork for the game. It appears on the Japanese and European versions of the game. Jaleco USA decided to use their own box art instead for the American release which is often considered to be one of the worst designs for a video game of all time.
Source: Wikipedia, "Tuff E Nuff", available under the CC-BY-SA License.