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

No

While the fundamental meaning of "pota" (tip, point, or extremity) is identical in both Brazilian and Continental Portuguese, there are differences in typical usage and idiomatic expressions. In Brazil, "ponta" is frequently used to describe the "end" of a period of time (e.g., "ponta da semana") or to refer to "clearance stock" (ponta de estoque). In Portugal, the word "fim" is much more standard for the end of a period, and "liquidação" or "fim de stock" is used for sales. Additionally, Brazilians sometimes use "ponta" to denote a very small amount or fragment of something, whereas a Portuguese person would more naturally use "um pouco" or "uma pitada."

Brazilian Portuguese usage

1. A ponta do lápis quebrou. (The tip of the pencil broke.)
2. A loja está com uma promoção de ponta de estoque. (The store is having a clearance sale.)
3. O nome dele está na ponta da língua. (His name is on the tip of my tongue.)
4. Na ponta da semana, estarei livre. (At the end of the week, I will be free.)
5. Ele tem uma ponta de experiência na área. (He has a tiny bit of experience in the field.)

Portuguese (Continental) usage

1. A ponta do lápis partiu-se. (The tip of the pencil broke.)
2. A loja está em liquidação. (The store is having a sale.)
3. O nome dele está na ponta da língua. (His name is on the tip of my tongue.)
4. No fim da semana, estarei livre. (At the end of the week, I will be free.)
5. Ele tem um pouco de experiência na área. (He has a little bit of experience in the field.)