Looks 'taller' (edge to top edge) which makes me think beams and floor joists thicker (and thus stronger) in the direction that they will expericane load.
I cant remember off hand but i think its 2 times as thcik for 4 x as strong....need to look it up.
When i think about it the main forces will be 'perpendicular' cutting edge to spine in most CUTTING. On the otehr hand when people put twist and sideways loads on their knives (which to be honest is rather abusive, even if it CAN take the stress) then the knife will have to be built with a 'fatter' (side to side) blade like a lot of what i think of as pry-bar knives. I think a lot of the cheeper 'tactcal' mod's do this- leaving a knife that will usaly not cut very well. That said i've got thick blades sharp enugh to shave, but they still didnt cut too well for me since they had to push fat sides through the material.
Back to the point which was that the people who lived IN the wilds 24/7/365 had 2 tools for their tasks- not neccisarily because the one couldnt DO the otehrs job, but because it was easyer and worked better to have two.