Dark knight or paladin

Hello people, there is something u probably saw countless times but I'm trying to make a choice between the paladin and the dark knight (my dark knight is 70 and my paladin is 60). I came to the game on january 2017 and played the paladin for 4 months then I look on the dark knight because in 3.x, he did the same things as the paladin but better: damage, delirium, magic damage cooldown and more ... Now in 4.X, at least for the moment, the paladin is just better in any point. Si here is my question: should I change back to paladin ? (I forgot to say than I enjoy both class)