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

Yes.

The meaning, spelling, and grammar of "vinte" are identical in both Brazilian and Continental Portuguese. The only difference is the pronunciation of the final syllable. In Brazilian Portuguese, the "te" is typically palatalized, sounding like "chi" (/vẽtʃi/). In Continental Portuguese, the final "e" is extremely reduced or almost silent, and the "t" is a dental/alveolar stop, making the word sound much shorter (/vẽt/).

Brazilian Portuguese Examples

1. Eu tenho vinte anos. (I am twenty years old.)
2. Ele comprou vinte laranjas. (He bought twenty oranges.)
3. O ônibus tem vinte passageiros. (The bus has twenty passengers.)
4. Eu vi vinte cachorros no parque. (I saw twenty dogs in the park.)
5. O celular custa vinte reais. (The cell phone costs twenty reais.)

Continental Portuguese Examples

1. Eu tenho vinte anos. (I am twenty years old.)
2. Ele comprou vinte laranjas. (He bought twenty oranges.)
3. O autocarro tem vinte passageiros. (The bus has twenty passengers.)
4. Eu vi vinte cães no parque. (I saw twenty dogs in the park.)
5. O telemóvel custa vinte euros. (The mobile phone costs twenty euros.)