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

Yes

The word "neles" is a contraction of the preposition em (in, on, or at) and the masculine plural pronoun eles (them). There are no differences in meaning, grammar, spelling, or fundamental usage between Brazilian and Continental Portuguese. The only difference is pronunciation: in Continental Portuguese, the unstressed vowels tend to be more "reduced" or closed (almost swallowed), whereas in Brazilian Portuguese, they are typically more open and clearly articulated.

Brazilian Portuguese Examples

1. Eu confio neles. (I trust them.)
2. Eu pensei neles o dia todo. (I thought about them all day.)
3. O que tem neles? (What is in them?)
4. Eu não acredito neles. (I don't believe them.)
5. Eu vi os erros neles. (I saw the errors in them.)

Continental Portuguese Examples

1. Eu creio neles. (I believe in them.)
2. Estive a pensar neles o dia todo. (I have been thinking about them all day.)
3. O que é que há neles? (What is there in them?)
4. Não ponho fé neles. (I don't have faith in them.)
5. Notei os erros neles. (I noticed the errors in them.)