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

No.

In Brazil, moletom (the plural is moletons) refers to the piece of clothing itself, such as a sweatshirt or a hoodie. In Portugal, moletom refers specifically to the type of fabric (fleece or heavy cotton). When a person in Portugal wants to refer to the garment, they typically use the English loanword sweatshirt or the term camisola de moletom (fleece sweater).

Brazilian Portuguese

• Eu comprei dois moletons novos. (I bought two new sweatshirts.)
• Esse moletom está muito quente para o inverno. (This sweatshirt is very warm for winter.)
• Ela sempre usa moletons coloridos. (She always wears colorful sweatshirts.)
• Preciso lavar meus moletons depois da viagem. (I need to wash my sweatshirts after the trip.)
• Esse moletom é o meu favorito. (This sweatshirt is my favorite.)

European Portuguese

• Eu comprei dois sweatshirts novos. (I bought two new sweatshirts.)
• Esta sweatshirt está muito quente para o inverno. (This sweatshirt is very warm for winter.)
• Ela usa sempre sweatshirts coloridos. (She always wears colorful sweatshirts.)
• Tenho de lavar as minhas sweatshirts depois da viagem. (I have to wash my sweatshirts after the trip.)
• Esta sweatshirt é a minha preferida. (This sweatshirt is my favorite.)