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

No

While the fundamental meanings of "estação" (season or station) are identical in both dialects, there are significant differences in typical usage and pronunciation.

In terms of usage, the word is paired with different vocabulary for transportation. In Brazil, "estação" is commonly used with trem (train) and metrô (metro). In Portugal, the word for train is comboio. Additionally, while a Brazilian might refer to a large bus terminal as an "estação de ônibus," a Portuguese person would typically use paragem for a bus stop or terminal for a larger hub, using "estação" primarily for rail or metro.

Regarding pronunciation, Brazilian Portuguese features more open vowels and a more melodic cadence. In Continental Portuguese, vowels that are not stressed are often "swallowed" or reduced, meaning the "es-" in "estação" sounds much more clipped and subtle to a Brazilian ear.

Brazilian Portuguese Examples

1. A estação de trem está muito cheia. (The train station is very full.)
2. Qual é a próxima estação do metrô? (What is the next metro station?)
3. O verão é a minha estação favorita. (Summer is my favorite season.)
4. Eu espero você na estação de ônibus. (I will wait for you at the bus station.)
5. O trem parou na última estação. (The train stopped at the last station.)

Portuguese (Portugal) Examples

1. A estação de comboios está muito cheia. (The train station is very full.)
2. Qual é a próxima estação do metro? (What is the next metro station?)
3. O verão é a minha estação favorita. (Summer is my favorite season.)
4. Eu espero por ti na paragem do autocarro. (I will wait for you at the bus stop.)
5. O comboio parou na última estação. (The train stopped at the last station.)