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

Yes.

The spelling, meaning, and grammatical gender of "sofá" are identical in both Brazilian and Continental Portuguese. The only differences are phonetic; the pronunciation and the rhythm (prosody) of the word may vary slightly depending on the regional accent, but the word itself remains the same.

Brazilian Portuguese Examples

1. Eu vou descansar no sofá. (I am going to rest on the sofa.)
2. O sofá está muito sujo. (The sofa is very dirty.)
3. Tem um cachorro dormindo no sofá. (There is a dog sleeping on the sofa.)
4. A gente precisa limpar o sofá. (We need to clean the sofa.)
5. Esse sofá é grande demais. (This sofa is too big.)

Continental Portuguese Examples

1. Eu vou descansar no sofá. (I am going to rest on the sofa.)
2. O sofá está muito sujo. (The sofa is very dirty.)
3. Há um cão a dormir no sofá. (There is a dog sleeping on the sofa.)
4. Nós precisamos de limpar o sofá. (We need to clean the sofa.)
5. Este sofá é demasiado grande. (This sofa is too big.)