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

Yes

The spelling, meaning, and grammatical function of "fácil" are identical in both varieties. The only difference is pronunciation:

• Brazilian Portuguese: The final "l" is vocalized, meaning it sounds like a "u" (e.g., fá-see-u). The vowels are generally more open, and the speech rhythm is more melodic.
• Continental Portuguese: The final "l" is a "dark L" (velarized), where the tongue moves toward the back of the mouth. The vowels are more closed, and unstressed syllables are often reduced or nearly silent.

Brazilian Portuguese Examples

1. A prova de matemática foi muito fácil. (The math test was very easy.)
2. É fácil achar o endereço. (It's easy to find the address.)
3. Esse exercício é bem fácil. (This exercise is quite easy.)
4. Não ache que tudo é fácil. (Don't think that everything is easy.)
5. Ficou fácil ganhar o jogo. (It became easy to win the game.)

Continental Portuguese Examples

1. A prova de matemática foi bastante fácil. (The math test was quite easy.)
2. É fácil encontrar o endereço. (It is easy to find the address.)
3. Este exercício é muito fácil. (This exercise is very easy.)
4. Não penses que tudo é fácil. (Don't think that everything is easy.)
5. É fácil chegar a este sítio. (It is easy to get to this place.)