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

Yes

The meaning, spelling, and grammatical function of "preocupado" are identical in both Brazilian and European Portuguese. The only difference lies in pronunciation:

• Brazilian Portuguese: The vowels are more "open" and clearly articulated. The "e" in the first syllable is usually pronounced clearly ([pre-o-ku-PA-du]).
• Continental Portuguese: The vowels are more "closed" and often reduced or swallowed. The "e" is often nearly silent or very short, making the word sound more like "pr'ocupado" ([pɾ'o-ku-PA-du]).

Brazilian Portuguese Examples

1. Estou muito preocupado com o resultado da prova. (I am very worried about the exam result.)
2. Ele parece preocupado com o trabalho. (He seems worried about work.)
3. Não precisa ficar preocupado, vai dar tudo certo. (You don't need to be worried, everything will work out.)
4. Minha mãe ficou preocupada porque eu não atendi o telefone. (My mother got worried because I didn't answer the phone.)
5. Estamos preocupados com a situação da economia. (We are worried about the economic situation.)

European Portuguese Examples

1. Estou muito preocupado com o resultado do exame. (I am very worried about the exam result.)
2. Ele parece preocupado com o trabalho. (He seems worried about work.)
3. Não te preocupes, vai correr tudo bem. (Don't worry, everything will go well.)
4. A minha mãe ficou preocupada porque eu não atendi o telefone. (My mother got worried because I didn't answer the phone.)
5. Estamos preocupados com a situação da economia. (We are worried about the economic situation.)