Is the word disse the same in Brazilian and European Portuguese?

No

While the word "disse" is identical in spelling, meaning, and grammatical function (it is the third-person singular, preterite perfect of the verb dizer), there are differences in typical usage and pronunciation:

• Usage (Syntax): In Brazil, it is common to place object pronouns before the verb (e.g., me disse). In Portugal, the standard usage is to place the pronoun after the verb (e.g., disse-me).
• Usage (Vocabulary context): The surrounding vocabulary used with "disse" often changes (e.g., Brazilians use todo mundo for "everyone," while Portuguese people often use toda a gente).
• Pronunciation: In Brazilian Portuguese, the final "e" is typically pronounced as a clear, light /i/. In Continental Portuguese, the final "e" is much more reduced, often sounding like a short, muffled /ɨ/ or becoming nearly silent.

Brazilian Portuguese Examples

1. Ele disse que ia chegar tarde. (He said he was going to arrive late.)
2. O que você disse? Não ouvi. (What did you say? I didn't hear.)
3. Ela me disse a verdade. (She told me the truth.)
4. Todo mundo disse que o filme é bom. (Everyone said the movie is good.)
5. Ele disse que não podia vir. (He said he couldn't come.)

Continental Portuguese Examples

1. Ele disse que ia chegar tarde. (He said he was going to arrive late.)
2. O que é que ele disse? Não ouvi. (What did he say? I didn't hear.)
3. Ela disse-me a verdade. (She told me the truth.)
4. Toda a gente disse que o filme é bom. (Everyone said the movie is good.)
5. Ele disse que não podia vir. (He said he couldn't come.)