Yes, you can find some size differences between brands. You can even see that the same brand can stock models which differ slightly in size.
We recommend you always verify what is the size equivalence of the product you are interested on in its American and European sizes. It could happen that you may always wear 5US men and by mistake you might be selecting a 5US women. Verifying the equivalence in the European sizing system or in centimeters, you will save yourself from making a mistake.
If a specific model fits in a particular manner, we try to include this information on the product page. If you have any other specific questions about how a model fits, please get in contact with our Customer Service Department and we will do our best to provide you with some advice.