The two nations lock horns in the European Championship quarter-finals on Friday, a fixture that many would have considered unlikely at the start of the tournament.
Lukaku – the younger brother of star striker Romelu - talked up Bale's class, saying that the Real Madrid forward may just edge out the Chelsea winger out in terms of quality.
"Bale is for me perhaps slightly higher than Hazard," the 21-year-old said at a press conference. "He's been playing longer at that level.
"At key moments at club level Bale is the man and he stands there, while Hazard is still not consistent."
Lukaku added: "The staff will devise a plan to neutralise Bale and Aaron Ramsey because they are the strongest players Wales have. So we will find a way to counter them but it will not be one player, it will be the whole team."