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

Yes

The word "maior" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. It is the comparative form of the adjective "grande" (big/large) and is used to denote greater size, importance, or intensity.

The only difference lies in pronunciation:

• Brazilian Portuguese: The vowels are generally more "open" and clearly articulated. The "o" in "maior" is pronounced with more clarity, and the rhythm of the word follows a more melodic, syllable-timed pattern.
• Continental Portuguese: The pronunciation is more "closed." Vowels that are not stressed are often reduced or almost swallowed (a phenomenon called vowel reduction). To an untrained ear, the unstressed vowels in "maior" might sound much shorter or more muffled than in Brazil.

Brazilian Portuguese Examples

1. Esta casa é maior que a minha. (This house is bigger than mine.)
2. Ele é o maior jogador do time. (He is the greatest player on the team.)
3. Eu preciso de um tamanho maior. (I need a larger size.)
4. O problema está ficando cada vez maior. (The problem is getting bigger and bigger.)
5. Ela tem uma responsabilidade maior agora. (She has a greater responsibility now.)

Continental Portuguese Examples

1. Esta casa é maior que a minha. (This house is bigger than mine.)
2. Ele é o maior jogador da equipa. (He is the greatest player on the team.)
3. Eu preciso de um tamanho maior. (I need a larger size.)
4. O problema está a ficar cada vez maior. (The problem is getting bigger and bigger.)
5. Ela tem uma responsabilidade maior agora. (She has a greater responsibility now.)