Very different from Depay, but similar in that he lacks that final speed to get him away from defenders and/or win the ball in foot races. He's far from slow, but most fullbacks in the PL are very athletic, and seeing as he isn't a playmaker out wide, his wing play is severely lacking. Garnacho isn't a speedster either, but he has more tricks up his sleeve and still has both better acceleration and top speed which are just about enough - and he will develop.
Antony either needs to develop his game into more of a Mata style out wide, Mahrez or Bernardo Silva - he will never be able to play as a winger that can take on his man. Unfortunately, being as isolated as he often is, that is what we are asking of him.