Different players, different team style approach, and different league...
But with the way Man Utd play, Hazard style is more useful...He will be an upgrade to Mata in term of speed and goal threat...And if Mkhi in his short Man Utd period could copy at least 80% of his Dortmund time, our wing attack will be joy to watch...and of course, Rashford or Martial, could play in their best position, Central Forward...
Back to Griezman...
If we look at ATM style of play, and their players, and also the Coach, Don Simeone..I describe ATM as "Beautifully a rigid defensive mentality team with a fully willingness to counter attack and kill the game"...there's no hesitation to play hard and sometimes dirty...like Stoke City with highest quality...
Mou has the ability to play the way Simeone play, but now he does not have the players to apply that approach...In Madrid, Mou has AdM, CR7, KB and Modric to play killing blaze counter attack...but now, who he has ??? Static Midfielders, 2 inconsistent winger, and one not so fast Big CF...only Valencia can play fast attack but even he has his limit (no left foot)....
Like Pogba, who's been supported by 2 different type of Midfielders (Pirlo the genius Quarter Back Play maker and Vidal the hard worker useful water carrier), Griezman also been supported by 3 midfielders with Harakiri Fighting Spirit in Saul, Koke, and Gabi...not mention the hard tackled defensive players in the mold of Godin, and Luis Felipe.
But in current squad, who will play the supporting roles like that ? Herrera ? Carrick ? Fellaini ?
With Man Utd current squad, i am not sure, Griezman will be more useful...If the price is the same, i will choose Hazard...
Just 2 cents from Newbie...pardon my bad English...