Taking nothing away from Crosby's skill, I think him "coming through" is the result of a better supporting cast and coach than OV. I put them both on that same level.
The knock on OV is he's turning into the ARod/Peyton Manning (pre championships) of the NHL. Crosby has the cup and has a better all around game so I give him the nod. OV is no slouch though and a solid playoff outting next year could close the gap.
Also, I know Sid already had the concussion so his health is up in the air, but I could see OV breaking down in a few years like Lindros did. He just plays too physical a game, his body is bound to give out on him.