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

Yes

The meaning, spelling, and grammatical function of "ótimo" are identical in both Brazilian and Continental Portuguese. The only difference is pronunciation. In most regions of Brazil, the "t" before the "i" is palatalized, meaning it sounds like a "ch" (as in "cheese"), making the word sound like ó-tchi. In Portugal, the "t" remains a dental consonant, so the word is pronounced with a crisp "t" sound, like ó-ti.

Brazilian Portuguese Examples

1. "Isso é ótimo pra gente!" (This is great for us!)
2. "O filme foi ótimo, você precisa ver." (The movie was great, you need to see it.)
3. "Você pode me ajudar? — Ótimo, obrigado!" (Can you help me? — Great, thanks!)
4. "A comida tá ótima!" (The food is great!)
5. "Tive um resultado ótimo na prova." (I had a great result on the test.)

Continental Portuguese Examples

1. "Parece-me uma ideia ótima." (It seems like a great idea to me.)
2. "O tempo está ótimo para uma caminhada." (The weather is great for a walk.)
3. "A notícia é ótima!" (The news is great!)
4. "O jantar estava ótimo, muito obrigado." (Dinner was great, thank you very much.)
5. "Recebi um feedback excelente." (I received excellent feedback.)