Zetterberg (15G, 28A = 43 Pts)
Datsyuk (30G, 38A = 68 PTs.)
Zetter had about 10 games less, so let's give him at least 2 more Goals and 6 more Assists in that period (which is generous).
While I would love to keep both and both are different players I would put my money on Datsyuk if I had to make a choice to retain one of them.
Of course there is debate, there is always debate.