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

No.

While the spelling, meaning, and conjugation of the word are identical, there are differences in typical usage and pronunciation. In Brazilian Portuguese, the object pronoun is commonly placed before the verb in natural, informal speech (e.g., "me empreste"). In Continental Portuguese, the standard usage in the imperative is to place the pronoun after the verb (e.g., "empreste-me"). Additionally, the pronunciation of the final unstressed "e" is significantly reduced to an "i" sound in most Brazilian dialects, whereas in Portugal, it remains a more closed, distinct vowel.

Brazilian Portuguese Examples

1. Me empreste o seu caderno, por favor. (Lend me your notebook, please.)
2. Me empreste o seu celular. (Lend me your cell phone.)
3. Me empreste um pouco de dinheiro. (Lend me a little money.)
4. Me empreste a sua caneta. (Lend me your pen.)
5. Me empreste o seu carregador. (Lend me your charger.)

Continental Portuguese Examples

1. Empreste-me o seu caderno, por favor. (Lend me your notebook, please.)
2. Empreste-me o seu telemóvel. (Lend me your mobile phone.)
3. Empreste-me um pouco de dinheiro. (Lend me a little money.)
4. Empreste-me a sua caneta. (Lend me your pen.)
5. Empreste-me o seu carregador. (Lend me your charger.)