Thorgan says it's unfair to judge him against the Chelsea star.
He told Sport / Foot Magazine: "I've know this since I was 14, when I returned to the Lens training center.
"What can be irritating, however, is when it is always the same questions that come back with the style: 'who is the stronger of the two?'. I find it stupid ... You have to make a difference: my brother is a genius, but I am not a genius.
"But I've never been jealous. I was always very happy with what was happening to him. And I was trying to go my merry way."