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

Yes

The spelling, meaning, and grammatical function of "lençóis" are identical in both Brazilian and Continental Portuguese. The only difference lies in pronunciation. In Brazil, the vowels tend to be more open and the rhythm is more syllable-timed, whereas in Portugal, unstressed vowels are often more reduced (nearly swallowed), and the "e" in "lençol" may be pronounced with a more closed sound.

Brazilian Portuguese Examples

1. Eu preciso trocar os lençóis hoje. (I need to change the bedsheets today.)
2. Esses lençóis estão muito macios. (These bedsheets are very soft.)
3. Você pode lavar os lençóis para mim? (Can you wash the bedsheets for me?)
4. O lençol azul combina com o quarto. (The blue sheet matches the room.)
5. Eu esqueci de esticar o lençol. (I forgot to stretch the sheet.)

Continental Portuguese Examples

1. Eu preciso de trocar os lençóis hoje. (I need to change the bedsheets today.)
2. Estes lençóis estão muito macios. (These bedsheets are very soft.)
3. Podes lavar os lençóis para mim? (Can you wash the bedsheets for me?)
4. O lençol azul combina com o quarto. (The blue sheet matches the room.)
5. Esqueci-me de esticar o lençol. (I forgot to stretch the sheet.)