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

Yes

The word "visitou" is identical in spelling, meaning, and grammatical conjugation in both Brazilian and Continental Portuguese. The only difference is in pronunciation:

• Brazilian Portuguese: The pronunciation is more "open." The syllables are articulated clearly, and the vowels are more resonant.
• Continental Portuguese: The pronunciation involves significant "vowel reduction." Unstressed vowels (like the "i" in vi-) are often shortened or nearly swallowed, and the final "o" is pronounced as a very closed, weak "u" sound.

Brazilian Portuguese Examples:

1. Ele visitou a vovó ontem. (He visited grandma yesterday.)
2. O turista visitou o Cristo Redentor. (The tourist visited Christ the Redeemer.)
3. Ela visitou o museu no feriado. (She visited the museum on the holiday.)
4. Meu amigo visitou o Brasil ano passado. (My friend visited Brazil last year.)
5. A criança visitou o zoológico. (The child visited the zoo.)

Continental Portuguese Examples:

1. Ele visitou a avó ontem. (He visited grandma yesterday.)
2. O turista visitou o monumento. (The tourist visited the monument.)
3. Ela visitou o museu durante as férias. (She visited the museum during the holidays.)
4. O meu amigo visitou o Brasil no ano passado. (My friend visited Brazil last year.)
5. A criança visitou o zoo. (The child visited the zoo.)