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

Yes

The only differences between the use of "iguais" in Brazilian Portuguese and Continental Portuguese are phonetic. There are no differences in meaning, spelling, or grammatical function.

In Brazilian Portuguese, the final "s" in "iguais" is typically pronounced as a sharp, alveolar [s], similar to the "ss" in the English word "pass." The vowels are generally more open and musical.

In Continental Portuguese, the final "s" is often pronounced as a postalveolar fricative [ʃ], creating a "sh" sound (e.g., "iguai-sh"), particularly in the Lisbon region. Additionally, Portuguese speakers tend to reduce or "close" unstressed vowels more than Brazilians do.

Brazilian Portuguese Examples

1. Eles são gêmeos iguais. (They are identical twins.)
2. Os resultados foram iguais. (The results were the same.)
3. Esses sapatos não são iguais. (These shoes are not the same.)
4. Nossas opiniões são iguais. (Our opinions are the same.)
5. As cores são muito iguais. (The colors are very similar.)

Continental Portuguese Examples

1. Eles são gémeos iguais. (They are identical twins.)
2. Os resultados foram iguais. (The results were the same.)
3. Estes sapatos não são iguais. (These shoes are not the same.)
4. As nossas opiniões são iguais. (Our opinions are the same.)
5. As cores são muito iguais. (The colors are very similar.)