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

No

While the fundamental meaning is the same (referring to tableware, plates, and cutlery), the answer is No due to differences in spelling and typical usage. In Brazil, the standard spelling is louça. In Portugal, the spelling loiça is a very common and traditional variant that reflects a different pronunciation. Additionally, the vocabulary used alongside the word often differs; for example, Brazilians refer to the kitchen sink as "pia," whereas Portuguese people typically use "lava-loiça," and Brazilians use "quebrar" for breaking, while Portuguese people more naturally use "partir."

Brazilian Portuguese

1. Eu detesto lavar a louça depois do jantar. (I hate washing the $\text{dishes}$ after dinner.)
2. A louça está toda na pia. (The $\text{dishes}$ are all in the sink.)
3. A louça quebrou durante a limpeza. (The $\text{dishes}$ broke during cleaning.)
4. Onde você guardou a louça limpa? (Where did you store the clean $\text{dishes}$?)
5. Não esqueça de secar a louça. (Don't forget to dry the $\text{dishes}$.)

Continental Portuguese

1. Eu detesto lavar a loiça depois do jantar. (I hate washing the $\text{dishes}$ after dinner.)
2. A loiça está toda no lava-loiça. (The $\text{dishes}$ are all in the sink.)
3. A loiça partiu-se durante a limpeza. (The $\text{dishes}$ broke during cleaning.)
4. Onde é que guardaste a loiça limpa? (Where did you store the clean $\text{dishes}$?)
5. Não te esqueças de secar a loiça. (Don't forget to dry the $\text{dishes}$.)