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

Yes

The word "escritoras" is identical in meaning, spelling, and grammar in both Brazilian and Continental Portuguese. The only differences lie in pronunciation. Brazilian Portuguese tends to have more open, clearly articulated vowels, whereas Continental Portuguese features more "closed" or reduced unstressed vowels (where the final "a" sounds much more like a short, muffled "uh"). Additionally, the "s" at the end of the word is typically pronounced as a "sh" sound ([ʃ]) in Portugal, while in many Brazilian dialects (such as in São Paulo), it is pronounced as a simple "s" sound ([s]).

Brazilian Portuguese Examples

1. As escritoras brasileiras são muito famosas. (Brazilian female writers are very famous.)
2. Eu gosto muito de ler essas escritoras. (I really like reading those female writers.)
3. Muitas escritoras ganharam o prêmio este ano. (Many female writers won the prize this year.)
4. As escritoras estão escrevendo livros novos. (The female writers are writing new books.)
5. Essas escritoras são muito inteligentes. (These female writers are very intelligent.)

Continental Portuguese Examples

1. As escritoras brasileiras são muito famosas. (Brazilian female writers are very famous.)
2. Eu gosto muito de ler estas escritoras. (I really like reading these female writers.)
3. Muitas escritoras ganharam o prémio este ano. (Many female writers won the prize this year.)
4. As escritoras estão a escrever livros novos. (The female writers are writing new books.)
5. Estas escritoras são muito inteligentes. (These female writers are very intelligent.)