I always hate the debate around leadership. What, specifically, has Crosby done as a leader? What, specifically, has McDavid failed to do?
It certainly is tough, but not completely impossible, to quantify. How about late/OT/clutch goals? (McDavid already has 2 playoff OT goals to Crosby's 1).
How about 1st goal of the game? I actually think about them a lot as a sneaky clutch stat.
In Crosby's first Cup run, (thus his second trip to the Finals). In each of the first three rounds he had games where he opened the scoring. I recall him setting the record, it was 6, (7?) different games where he set the tone right out of the gate with the first goal of the game. (Does Crosby still have that record I wonder? I just remember it being mentioned then, and of course it felt like he was scoring first every night).
Of course we all know, he was then a little underwhelming in the Finals, but his team won.
McDavid has now led his team to a Final, and outperformed Crosby statistically in the final round specifically, but his team lost. He did lead his team quite well imo, but it wasn't enough.
Crosby lost his first final too of course, with a lesser performance in the Finals again.
It is possible that McDavid will end up the better player (I believe he's basically there already), but remain not as good a "leader" as Crosby.