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

No.

While the spelling and the use of the word as an adjective (meaning "historical" or "historic") are identical, there are differences in pronersunciation and typical usage.

• Pronunciation: In Brazilian Portuguese, vowels are generally more open and unstressed vowels are clearly articulated. In Continental Portuguese, there is significant vowel reduction; unstressed vowels are often "swallowed" or pronounced as a very short, closed sound (for example, the final "o" often sounds like a faint "u").
• Usage: In Brazil, "histórico" is the standard word for both the adjective and the noun used to describe a person's record (medical, academic, etc.). In Portugal, while "histórico" is used as an adjective, the word "historial" is much more natural and common when referring to a person's track record or history of events (e.g., medical history or flight history).

Brazilian Portuguese Examples

1. Esse é um momento histórico para nós. (This is a historic moment for us.)
2. O médico analisou o histórico do paciente. (The doctor analyzed the patient's history.)
3. Eu preciso imprimir o meu histórico escolar. (I need to print my academic transcript.)
4. O centro histórico da cidade é muito bonito. (The city's historic center is very beautiful.)
5. Ele tem um histórico de bom comportamento. (He has a history of good behavior.)

Portuguese (Continental) Examples

1. Este é um momento histórico para nós. (This is a historic moment for us.)
2. O médico analisou o historial do paciente. (The doctor analyzed the patient's history.)
3. Eu preciso de imprimir o meu histórico escolar. (I need to print my academic transcript.)
4. O centro histórico da cidade é muito bonito. (The city's historic center is very beautiful.)
5. Ele tem um historial de bom comportamento. (He has a history of good behavior.)