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

No

While the core meaning of "vocês" (the second-person plural "you all") is the same in both dialects, there are significant differences in typical usage and pronunciation:

• Usage (Social Register): In Brazil, "vocês" is the universal standard for addressing any group, regardless of formality. In Portugal, "vocês" is primarily used in informal or familiar settings (friends, family). In formal or professional contexts, a Portuguese person will avoid "vocês" and instead use "os senhores" or "as senhoras" to maintain social distance and respect.
• Grammar (Clitic Pronouns): In informal Portuguese, it is much more natural to use the clitic pronoun "vos" (attached to the verb, e.g., amo-vos) rather than using "vocês" as the object of a sentence.
• Pronunciation: In Brazil, the vowels are generally more open, and the final "s" is often pronounced as a soft "s" or "z". In Portugal, the vowels are more closed, and the final "s" is pronounced as a "sh" (/ʃ/) sound.

Brazilian Portuguese Examples

1. Vocês vão à festa hoje? (Are you all going to the party today?)
2. O que vocês comeram no almoço? (What did you all eat for lunch?)
3. Vocês precisam de ajuda? (Do you all need help?)
4. Eu amo vocês! (I love you all!)
5. Vocês são muito legais. (You all are very nice.)

Portuguese (Portugal) Examples

1. Os senhores vão à festa hoje? (Are you [formal] going to the party today?)
2. O que os senhores comeram? (What did you [formal] eat?)
3. Os senhores precisam de ajuda? (Do you [formal] need help?)
4. Eu adoro-vos! (I adore you all!)
5. Os senhores são muito simpáticos. (You all are very nice.)