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

Yes

The meaning, grammar, and spelling of "visitar" are identical in both Brazilian and Continental Portuguese. The only difference lies in pronunciation.

In Brazil, vowels are generally more "open" and clearly articulated, even in unstressed syllables. In Portugal, vowels are often "reduced" or "swallowed," meaning unstressed vowels (like the 'a' in the middle of words) are much shorter, more closed, or almost silent. Additionally, the pronunciation of the letter "s" at the end of syllables or words differs, with Brazilians often using a "s/z" sound and Portuguese people using a "sh" sound.

Brazilian Portuguese Examples

1. Eu quero visitar meus avós no final de semana. (I want to visit my grandparents on the weekend.)
2. Nós vamos visitar o Museu do Ipiranga amanhã. (We are going to visit the Ipiranga Museum tomorrow.)
3. Ela adora visitar novos lugares quando viaja. (She loves visiting new places when she travels.)
4. Você pode visitar a gente mais tarde? (Can you visit us later?)
5. Vou visitar meu amigo que mora no Rio. (I'm going to visit my friend who lives in Rio.)

Continental Portuguese Examples

1. Quero visitar os meus avós este fim de semana. (I want to visit my grandparents this weekend.)
2. Vamos visitar o Museu de Belém amanhã. (We are going to visit the Belém Museum tomorrow.)
3. Ela gosta de visitar sítios novos quando viaja. (She likes visiting new places/sites when she travels.)
4. Podes vir visitar-nos mais tarde? (Can you come visit us later?)
5. Vou visitar o meu amigo que vive em Lisboa. (I'm going to visit my friend who lives in Lisbon.)