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

Yes

The word "estes" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. It is the masculine plural form of the demonstrative pronoun/adjective "este" (this), used to refer to objects or people close to the speaker. The only difference is pronunciation: in Brazil, the vowels are generally more open and the rhythm of speech is more melodic, whereas in Portugal, vowels in unstressed syllables are often more closed or even reduced (nearly silent).

Brazilian Portuguese Examples

1. Estes livros são novos. (These books are new.)
2. Estes garotos estão brincando. (These boys are playing.)
3. Estes ônibus são muito rápidos. (These buses are very fast.)
4. Estes trens estão atrasados. (These trains are late.)
5. Estes sapatos são caros. (These shoes are expensive.)

Portuguese (Continental) Examples

1. Estes livros são novos. (These books are new.)
2. Estes miúdos estão a brincar. (These kids/boys are playing.)
3. Estes autocarros são muito rápidos. (These buses are very fast.)
4. Estes comboios estão atrasados. (These trains are late.)
5. Estes sapatos são caros. (These shoes are expensive.)