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

No

While the word "reparou" (the third-person singular preterite of reparar) is used in both dialects, there are significant differences in meaning and usage:

• Meaning: In Brazilian Portuguese, reparar is almost exclusively used to mean "to notice" or "to observe" (synonymous with notar). In Continental Portuguese, while it also means "to notice," the word has a much broader range. It is also commonly used to mean "to repair/fix" (synonymous with consertar) and "to scold/reprimand" (synonymous with repreender).
• Usage/Grammar: In Brazil, the second-person subject is typically "você," which uses the third-person conjugation (você reparou). In Portugal, the informal second-person "tu" is much more common, requiring the conjugation reparaste.

Brazilian Portuguese Examples

1. Você reparou no erro que eu cometi? (Did you notice the error I made?)
2. Ele não reparou que eu estava triste. (He didn't notice that I was sad.)
3. Você reparou se a porta estava aberta? (Did you notice if the door was open?)
4. Ninguém reparou no novo corte de cabelo dela. (Nobody noticed her new haircut.)
5. Ela reparou no detalhe do vestido. (She noticed the detail on the dress.)

Continental Portuguese Examples

1. Reparaste no erro que eu cometi? (Did you notice the error I made?)
2. Ele não reparou que eu estava triste. (He didn't notice that I was sad.)
3. Reparaste se a porta estava aberta? (Did you notice if the door was open?)
4. Ninguém reparou no novo corte de cabelo dela. (Nobody noticed her new haircut.)
5. Ela reparou no detalhe do vestido. (She noticed the detail on the dress.)