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

Yes

The word "violino" is identical in both Brazilian and European Portuguese in terms of its meaning, spelling, and grammatical usage. The only difference lies in the pronunciation. In Brazilian Portuguese, the vowels tend to be more open and the rhythm of the word is more melodic and "syllable-timed." In European Portuguese, the pronunciation is more "stress-timed," meaning unstressed vowels (like the "i" in the middle of the word) are often reduced, shortened, or almost swallowed, giving the word a more clipped sound.

Brazilian Portuguese Examples

1. Eu estou aprendendo a tocar violino. (I am learning to play the violin.)
2. O som do violino é muito emocionante. (The sound of the violin is very moving.)
3. Ela comprou um violino novo ontem. (She bought a new violin yesterday.)
4. O professor de violino é muito paciente. (The violin teacher is very patient.)
5. Adoro ouvir música clássica com violino. (I love listening to classical music with violin.)

European Portuguese Examples

1. Estou a aprender a tocar violino. (I am learning to play the violin.)
2. O som do violino é muito emocionante. (The sound of the violin is very moving.)
3. Ela comprou um violino novo ontem. (She bought a new violin yesterday.)
4. O professor de violino é muito paciente. (The violin teacher is very patient.)
5. Adoro ouvir música clássica com violino. (I love listening to classical music with violin.)