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

Yes

The word "feias" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. The only difference is pronunciation. In Brazilian Portuguese, the vowels tend to be more open and clearly articulated. In Continental Portuguese, unstressed vowels are often subject to significant reduction or "clipping," which results in a different rhythmic pattern and a more closed sound for the same word.

Brazilian Portuguese

1. Essas unhas estão muito feias. (Those nails are very ugly.)
2. As cores desse quarto são feias. (The colors of that room are ugly.)
3. Elas usam roupas muito feias. (They wear very ugly clothes.)
4. Achei aquelas flores feias. (I thought those flowers were ugly.)
5. Essas fotos ficaram feias. (Those photos turned out ugly.)

European Portuguese

1. Estas unhas estão muito feias. (These nails are very ugly.)
2. As cores desse quarto são feias. (The colors of that room are ugly.)
3. Elas usam roupas muito feias. (They wear very ugly clothes.)
4. Achei aquelas flores feias. (I thought those flowers were ugly.)
5. Estas fotografias ficaram feias. (These photographs turned out ugly.)