If you could choose either player in his prime...
2X Hart finalist, 2X Pearson nominee, 1 Art Ross, Calder winner, 1.25 career P/G, 1.16 career playoff P/G, 1 Cup finals appearance
1X Hart winner, 1X Pearson winner, Art Ross runner up by default, 1.13 career P/G, 1.07 career playoff P/G, 1 Cup finals appearance
During the 2002 games, I asked one of my friends who'd just gotten his Green Card whether he was for his native Canadians, or his newly beloved Yanks:
"It's hard to go against my roots, but Lindros can be such a bitch. I hope the US takes it to him hard and often. I hate to say it, but 'Go team USA'"
And there you are.
Personally, I'd take Lindros in his prime. He really was the complete package before he had his twenty or so concussions. Malkin hasn't peaked yet, so the question is a terrible one, but the two are so similar.