As most people here (I assume) I also have a Steam account and would be nice to had a way to compare the libreries. To be more specific, I will like to see a new whislist here on GOG with the games in my Steam Whislist and another wishlist with the game in my Steam Library

This will malke things more easy, I can buy games that I look on Steam and didnt know there where here

Just an idea for a new feature

IMHO not going to happen as GOG and Steam are two different companies and such feature will not bring any revenue back to GOG.

im pretty sure here are some websites where you can import both gog and steam wishlist and compare them.

I have one.

www.write_them_down_on_a_piece_of_paper.com