Wunderbar,
i guess it depends on the blade. The emerson blade is fairly strong build compared to the BM. To break the Buck would need so much force that it would have been ridicolous (?) for that test (leaning towards real life situations).
And it strongly depends on the construction. The emerson is bending friendly. Just the pivot holds it together in that area. Compared the Spyderco and BM which are stiffer caused by screwed stop pins and more.
I´ve handle an LE M16 and found it so weak in construction that i strongly believe it will never break, but will never pry aswell.
I will do a search because some models were older ones not the actual. F.e. the overall quality, which was low on the comander shall have increased. Maybe the BM was ATS34.
I´ve seen a test where a dutch knifemakers blade (Hill?) was tested. Typical sabre grind HRC 59 154CM. Good resistance to edge smacks on soft steel (due to the hardness) took a bending of 500N without breaking. 5mm thickness in stock.
I guess a good edge comes from a proper ht. No matter the angle. Remember BMs ATS34. Many people weren´t happy with it.