Speaking strictly about his physique, it's clear that his muscle is not nearly as lean or defined.
He mentioned in his documentary at the commission hearing regarding his past failed test, that he had gained 9 pounds and referred to it as 'getting bigger'. By getting bigger I assume he means getting fatter because he clearly didn't add muscle based on the pictures.
Always Supporting Fighters That Fight to Finish or be Finished
2014 Superfight Advocate
Jones vs Silva