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

Yes

The meaning, spelling, and grammatical function of "setenta" are identical in both Brazilian and Continental Portuguese. The only difference lies in pronunciation. In Brazilian Portuguese, the vowels tend to be more "open" and clearly articulated. In Continental Portuguese, there is a stronger tendency toward vowel reduction, meaning the unstressed vowels (like the "e" in the middle of the word) may be shortened or pronounced much more closed, making the word sound more "clipped" to a Brazilian ear.

Brazilian Portuguese Examples

1. Eu tenho setenta reais na carteira. (I have seventy reais in my wallet.)
2. Ela completou setenta anos ontem. (She turned seventy years old yesterday.)
3. O ônibus passa às sete e setenta. (The bus passes at seven seventy/seven o'clock and forty minutes.)
4. Tem setenta pessoas na festa hoje. (There are seventy people at the party today.)
5. Eu preciso de setenta minutos para terminar. (I need seventy minutes to finish.)

Continental Portuguese Examples

1. Eu tenho setenta euros na carteira. (I have seventy euros in my wallet.)
2. Ela fez setenta anos ontem. (She turned seventy years old yesterday.)
3. O autocarro passa às sete e setenta. (The bus passes at seven seventy/seven o'clock and forty minutes.)
4. Há setenta pessoas na festa hoje. (There are seventy people at the party today.)
5. Eu preciso de setenta minutos para terminar. (I need seventy minutes to finish.)