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

No

While the meaning, spelling, and grammar of "né" (a contraction of não é?) are the same in both dialects, the typical usage differs significantly. In Brazilian Portuguese, "né" functions as an extremely frequent discourse marker or "filler" word, used almost like a verbal comma to maintain conversational flow or seek constant micro-affirmations. In Continental Portuguese, while "né" is used, it is much less common as a filler; Portuguese speakers instead rely more heavily on the full form "não é?", "certo?", or "pois não?" to achieve the same effect.

Brazilian Portuguese Usage

1. "A comida está ótima, né?" (The food is great, right?)
2. "Você vai chegar tarde, né?" (You're going to arrive late, right?)
3. "Isso é muito engraçado, né?" (That is very funny, isn't it?)
4. "Ele não vem hoje, né?" (He isn't coming today, right?)
5. "Você já estudou, né?" (You've already studied, right?)

Continental Portuguese Usage

1. "A comida está ótima, não é?" (The food is great, isn't it?)
2. "Vais chegar tarde, não é?" (You're going to arrive late, isn't it?)
3. "Isto é muito engraçado, certo?" (This is very funny, right?)
4. "Ele não vem hoje, pois não?" (He isn't coming today, is he?)
5. "Tu já estudaste, não é?" (You've already studied, isn't it?)