 If you liked
Cowboy Bebop: Tengoku no Tobira
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 ...then you might like
Dirty Pair: The Movie
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Each of these movies can be viewed as extra-long standalone episodes within their respective TV series. As for the direct similarities: they're both sci-fi action flicks with memorable soundtracks (80s pop-rock in Dirty Pair, modern jazz in Cowboy Bebop) and animation quality reflecting the higher budget of movies compared to individual TV episodes.
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Recommended by Quetzal_dactylus