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

Yes

The word "estados" is identical in meaning, spelling, and grammar in both Brazilian and Continental Portuguese. The only difference is in pronunciation, specifically regarding vowel clarity and reduction:

• Brazilian Portuguese: The vowels tend to be more open and clearly articulated. The "e" in "estados" is typically an open [e], and the "o" is a clear [u].
• Continental Portuguese: Unstressed vowels are often "reduced" or "closed." The "e" may be pronounced as a closed [ɛ] or even a nearly silent, reduced [ɨ], and the "o" is a very closed [u].

Brazilian Portuguese Examples

1. O Brasil é dividido em 26 estados. (Brazil is divided into 26 states.)
2. Ele viajou por vários estados do país. (He traveled through various states of the country.)
3. Os estados da matéria são sólido, líquido e gasoso. (The states of matter are solid, liquid, and gaseous.)
4. Ela está em um estado de muita alegria. (She is in a state of great joy.)
5. Os Estados Unidos são um país muito grande. (The United States is a very large country.)

Continental Portuguese Examples

1. Portugal é dividido em vários distritos. (Portugal is divided into several districts.)
2. Ele viajou por vários distritos do país. (He traveled through various districts of the country.)
3. Os estados da matéria são sólido, líquido e gasoso. (The states of matter are solid, liquid, and gaseous.)
4. Ela está em um estado de muita alegria. (She is in a state of great joy.)
5. Os Estados Unidos são um país muito grande. (The United States is a very large country.)