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

Yes

The word "convidados" is identical in meaning, spelling, and grammar in both Brazilian and Continental Portuguese. The only differences lie in pronunciation. In Brazil, the vowels tend to be more open and clearly articulated, and the "d" sound is often more dental. In Portugal, the vowels are more closed and often reduced (de-vocalized), making the word sound more "clipped" or swallowed compared to the Brazilian pronunciation.

Brazilian Portuguese Examples

1. Os convidados chegaram cedo para a festa. (The guests arrived early for the party.)
2. Eu preciso confirmar o número de convidados até amanhã. (I need to confirm the number of guests by tomorrow.)
3. A comida para os convidados estava uma delícia. (The food for the guests was delicious.)
4. Não esqueça de dar as boas-vindas aos convidados. (Don't forget to welcome the guests.)
5. A lista de convidados está ficando enorme! (The guest list is getting huge!)

Continental Portuguese Examples

1. Os convidados chegaram cedo à festa. (The guests arrived early to the party.)
2. É necessário confirmar o número de convidados até amanhã. (It is necessary to confirm the number of guests by tomorrow.)
3. A comida para os convidados estava excelente. (The food for the guests was excellent.)
4. Não te esqueças de dar as boas-vindas aos convidados. (Don't forget to welcome the guests.)
5. A lista de convidados é bastante extensa. (The guest list is quite extensive.)