The one on that photo is very legit, he was recognized by Chatral Rinpoche and others. He has also much contact with the daughter of Chatral Rinpoche and is very respected. He is without a doubt legit. The other one of that I know was recognized by Trulshik Rinpoche though. There is absolute no argument or conflict between those parties, they are both considered legit. I met this Dudjom Yangsi Rinpoche you can see in the picture above and I had a very good impression.