Only the ST350041
8AS is single platter, designated by the bold number. That means ST31000528AS is two platter.
WD1001FALS (Caviar Black) is 3 platter. Not sure about the other two Caviar Green drives you listed.
You can check out this
review for all current 1TB, their specs. and real-world speed.
Does single platter drive use much less power and generate much less heat?
points out their power consumption difference between 500GB and 333/375GB platters. Not a lot compared to spindle speed which affects more.