Yes, you can find differences between brands. You will even find that, within the same brand, not all shoes are sized the same way.
We recommend that you always check the equivalence between the European and American system. Because of an oversight, for example, you might end up buying a US 5 for women when your usual size is a US 5 for men, or the other way around. By verifying the equivalence with the European system and the centimeters, you won't run this risk.
Products with specific women's sizing usually include the wording "W" or "WMNS" in their name.
If a specific model is sized in a particular way, we try to include this information in the product sheet. If you have any specific questions, please contact us and we will happily help you.