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

No.

The difference lies in typical usage and grammatical agreement. In Brazil, "canta" is the standard conjugation used to address someone directly via the pronoun você (the most common way to say "you"). In Portugal, the standard way to address someone directly is via tu, which requires the conjugation "cantas" for statements. While "canta" is used in both dialects as the imperative (a command) and the third-person singular, its role as the primary way to express "you sing" is a distinct Brazilian usage. Additionally, in Brazil, "canta" is used in slang to mean "to reveal" or "to confess" (e.g., "to sing" a secret), whereas a Portuguese speaker would typically use a different verb like confessar.

Brazilian Portuguese Examples

1. Você canta muito bem. (You sing very well.)
2. Ela canta no coral. (She sings in the choir.)
3. Canta essa música para mim! (Sing this song for me!)
4. Ele canta o dia todo. (He sings all day.)
5. O rapaz cantou o paradeiro do ladrão. (The young man revealed the thief's whereabouts.)

Continental Portuguese Examples

1. Tu cantas muito bem. (You sing very well.)
2. Ela canta no coro. (She sings in the choir.)
3. Canta essa música para mim! (Sing this song for me!)
4. Ele canta o dia todo. (He sings all day.)
5. O rapaz confessou o paradeiro do ladrão. (The young man confessed the thief's whereabouts.)