Poor J-50, it most likely flew before the J-36 and also had leaks online days to weeks earlier. Only for those leaks to be dismissed because everyone was looking for the rumoured tri-jet while no one expected a next-gen fighter from SAC. Such dismissal wasn't even illogical given the complete secrecy of the project relative to CAC's programme.
History won't remember that, technically, the J-50 was the first to break cover. J-36 was the second.
Once SAC give vague hints that they might export J-50 to a certain Chinese ally the amount of internet aura boost to the J-50 will be tremendous.