Are you really telling me that one of the driving forces behind the Porto success the past years hasn't proved more than an upcomming player from Lille?

Tell me the truth, when did you start watching him? Last season he was a trickypony without a brain and was one of the main reasons of Porto's failure. This year, yes, he has improved his game and become more rational on the pitch. With an excellent squad, Porto did great both in league (Portugal, still not the great stages) and in EL. He was one of their key players, no doubts about it.
Hazard, in the other hand, with a worse squad than Lyon or Marseille, for example, was Lille's key player alongside Gervinho in the championship road. Both Hulk and Hazard aren't still starters for their NTs (eventhough Brazil has better players). Probably Hazard will be the best Ligue 1 player of the season, too.
Hazard born in 1991 and Hulk in 1986.
IMO, both are still unproven players, but Hazard is much more younger than the brazilian and has also a better margin to improve.
