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

Yes

The word "presidente" is identical in spelling, meaning, and grammar in both Brazilian and Continental Portuguese. The only difference is pronunciation. In Brazilian Portuguese, the vowels are generally more open, and the final "e" is often pronounced as an [i] sound. In Continental Portuguese, the pronunciation is more "stress-timed," meaning unstressed vowels are heavily reduced; consequently, the final "e" is often nearly silent or extremely short.

Brazilian Portuguese Examples:

1. O presidente da empresa chegou agora. (The company president arrived just now.)
2. Nós vamos votar para presidente amanhã. (We are going to vote for president tomorrow.)
3. O presidente deu um discurso muito longo. (The president gave a very long speech.)
4. Ele foi eleito presidente do grêmio estudantil. (He was elected president of the student union.)
5. O presidente cancelou a reunião de última hora. (The president canceled the meeting at the last minute.)

Portuguese (Portugal) Examples:

1. O presidente da empresa acabou de chegar. (The company president has just arrived.)
2. Vamos votar para presidente amanhã. (We are going to vote for president tomorrow.)
3. O presidente fez um discurso muito longo. (The president gave a very long speech.)
4. Ele foi eleito presidente do clube. (He was elected president of the club.)
5. O presidente cancelou a reunião de última hora. (The president canceled the meeting at the last minute.)