Rob Gronkowski's hit was dirtier than JuJu Smith-Schuster's. Why did they get the same suspension?

Rob Gronkowski's hit was dirtier than JuJu Smith-Schuster's. Why did they get the same suspension?  SB Nation Steelers' JuJu Smith-Schuster, Bengals' George Iloka suspended 1 game for hits  USA TODAY Rob Oller | NFL must get better at policing cheap shots  The Columbus Dispatch NFL suspends Steelers' Smith-Schuster and Bengals' Iloka one game each  STLtoday.comFull coverage