I've played King of Siam, Liberte, Maharaja, Kreta and Imperial. Well, let me tell you that this game (King of Siam) has very small resemblences with the others. It plays different enough. Altough I have to agree that if you want to compare it with any of these games, Liberte and Kreta seem more alike.
Now that i have spent more time with King of Siam, and even own the game i have to agree that it shares more with Liberte then any of the other games. I still havent had the time ty try it out but that will happen soon i hope.