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

Yes

The word "pelas" is a contraction of the preposition por and the feminine plural definite article as. There are no differences in meaning, grammar, or spelling between Brazilian and European Portuguese. The only distinction is phonetic: in most regions of Brazil, the "s" at the end of the word is pronounced as a soft [s], whereas in Portugal, it is typically pronounced as a "sh" sound [ʃ].

Brazilian Portuguese

1. Caminhando pelas ruas do bairro. (Walking through the neighborhood streets.)
2. Correndo pelas áreas verdes. (Running through the green areas.)
3. Olhando pelas janelas do ônibus. (Looking through the bus windows.)
4. Espalhando as notícias pelas redes sociais. (Spreading the news through social media.)
5. Passando pelas estradas de terra. (Passing through the dirt roads.)

European Portuguese

1. Caminhando pelas ruas do bairro. (Walking through the neighborhood streets.)
2. Correndo pelas áreas verdes. (Running through the green areas.)
3. Olhando pelas janelas do autocarro. (Looking through the bus windows.)
4. A espalhar as notícias pelas redes sociais. (Spreading the news through social media.)
5. Passando pelas estradas de terra. (Passing through the dirt roads.)