Nylander has a much higher compete level then Marner. Just because Marner jumps up and down after every play doesnt mean he tries hard.
Marner was soft as butter in the playoffs as that is what he does best. Sure he skates fast in a wreakless way, but that doesnt equal better compete, thats someone that isnt aware of the situation.
Babcock has tried a lot of things to get rid of the immature habits of this player, but sadly Marner simply isnt very smart and refuses to learn. Marner also was invisible in last years playoffs, where Nylander outplayed him.
Marner is butter soft and until this changes, we will be left with a flawed player.
Nylander works much harder and is more efficient as well. He is very good at reading the situation and knowing when to go at 100%. Nylander simply is much more effective then Marner.