Regular Season:
-> Ovechkin had essentially the exact same goals/points as Crosby, in 9 less games played. This is a very clear and decently large advantage for Ovechkin
Playoffs:
-> Crosby was 6 goals and 19 points in 13 games. Ovechkin was 5 goals and 10 points in 7 games. This is pretty much identical production, except Ovechkin was a significantly better goal scorer in the playoffs. Giving Crosby any advantage for playoffs is simply saying because his TEAM did better, Crosby was the better player (which is a terrible argument).
Olympics:
-> Both were a point per game, and both were about 0.5 goals/gp. Crosby also had a much more stacked team, and was in a 4-way tie for 2nd in points on his own team (with another 4 players that had 1 less point than him on his own team). Everyone on that team C team was producing points, and other than the golden goal, Crosby was not producing on any other kind of level that was much better than Ovechkin.
This is easily Ovechkin again.