craigcBased on the weights listed here, and comparing with descriptions of the knives on Amazon:
The 6.5-inch Cleaver and 7-inch Veggie Knife should have thinner and lighter, 1.8mm thick blades.
The 6.5-inch 'Bone Chopper' Cleaver, and both of the 8-inch Cleavers should have thicker and heavier, 3.5mm thick blades.
Zhen also make a thinner 1.8mm version of the 8-inch cleaver, but it's not available as part of this drop. Which is perhaps a pity since one of the reviews for it states "It's my only knife that I feel safe using to chop up large rutabagas. I can safely pound the cleaver through a large rutabaga while keeping my fingers far away from the cutting edge".
From what I've read you're probably better off with a thinner blade for rutabagas, thicker blades are more inclined to wedge and jam.