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

No

While the spelling, grammar, and literal meaning of "salvou" are identical, there are differences in typical usage and pronunciation. In Brazilian Portuguese, "salvou" is frequently used colloqually as a shorthand or standalone expression to mean "you helped me out" or "that was a lifesaver" (e.g., "Valeu, salvou!"). In Continental Portuguese, this shorthand is rare; a speaker would more naturally use the second-person form ("salvaste-me") to express the same idea. Furthermore, the pronunciation differs: Brazilian Portuguese tends to have more open vowels and a more syllable-timed rhythm, whereas Continental Portuguese uses more closed, reduced vowels and a stress-timed rhythm.

Brazilian Portuguese Examples:

1. O bombeiro salvou o gatinho da árvore. (The firefighter saved the kitten from the tree.)
2. O computador salvou o arquivo automaticamente. (The computer saved the file automatically.)
3. Essa nota salvou o meu semestre! (This grade saved my semester!)
4. O gol salvou o time no último minuto. (The goal saved the team in the last minute.)
5. Valeu, salvou! (Thanks, you saved me/helped me out!)

Continental Portuguese Examples:

1. O bombeiro salvou o gato da árvore. (The firefighter saved the cat from the tree.)
2. O computador salvou o ficheiro automaticamente. (The computer saved the file automatically.)
3. Esta nota salvou o meu semestre! (This grade saved my semester!)
4. O golo salvou a equipa no último minuto. (The goal saved the team in the last minute.)
5. Obrigado, salvaste-me! (Thanks, you saved me!)