Dude, no. Crosby is far and away a better defensive player than McDavid. He’s not as fast so he needs to be smarter with his defensive positioning. You rarely see Sid blow the O-zone early like McDavid does fairly frequently. It’s pretty much the only area where McDavid needs improvement.
Do you want to see Crosby's stats in his 1st Cup Finals 2009? -3, with 3 whopping points (1 goal) in 7 games (Pittsburgh won, Malkin got Conn Smythe, MAF was outstanding in game 6 and 7).
Crosby has had many playoff series' as a minus player, many more times than McDavid.
-1 in 2010 playoffs vs Montreal (loss), -3 in round 1 vs Philly 2012 (1st round exit), 2013 -1 vs NYI (they won), -2 vs Boston 2013 (loss), -2 vs Columbus 2014 (won), -2 vs Rangers 2014 (loss) this is just for 2010-2014.
The Penguins have big disparity because their goaltending has been miles better.
2017 Cup
Round 1 vs Columbus - .933 (MAF)
Round 2 vs Wash - .921 (MAF)
Round 3 vs Ott - .910 (MAF) replaced .946 (Murray)
Round 4 vs Nash - .931 (Murray)
2016 Cup
Round 1 vs NYR - .955 (Murray)
Round 2 vs Wash - .926 (Murray)
Round 3 vs Tampa - .904 (Murray) series went to game 7 (Crosby 0 points in g7)
Round 4 vs SJS - .920 (Murray)
2009 Cup
Round 1 Vs. Phil - .922 (MAF)
Round 2 Vs. Wash - .878 (MAF) vs. .895 (Varlamov/Theodore)
Round 3 Vs. Carolina - .924 (MAF)
Round 4 Vs. Det - .913 (MAF) outstanding in game 6 + 7
Basically in 3 runs, Pittsburgh had 1 whopping round total where their goaltending was "bad" and they got lucky in that round because Washington's goalies were about the same (crap).
That's actually the magic difference.