They're definitely not the same, but the fact that Larionov was outscored by both guys on a pretty regular basis does say something.
Regarding Datsyuk/Zetterberg vs. Crosby: Is it possible that Babcock wanted to match Zetterberg against Crosby, and Datsyuk against Malkin? Did he see something stylistically that gave them an advantage? Or did he think Malkin was the bigger threat? Malkin outscored Crosby in a raw and per-game basis in both the regular season and playoffs in that season.
Looking at Behind the Net, these are the top opponents for Crosby & Malkin
Crosby: Lidstrom, Rafalski, Zetterberg, Cleary, ?
Malkin: Stuart, Kronwall, Filppula, Hossa, ?
In both cases, we aren't sure who the last forward was on those Detroit lines that faced them. Edit:
Datsyuk also did not play in Games 1-4, he had a foot injury, and returned for Game 5. So his foot surely was not completely healed and Babcock may not have wanted to put him up against Crosby on a bad tire?