Lets compare this in another way.

Lets take 2 different bolts that are manufactured by the same company bolts
and are tested the same by applying torque to them until they break and
record the torque reading.

Bolt TB2 is sold as a Premium Quality bolt, is 1/4" in diameter and breaks
at 750 foot pounds. Cost 25 cents.
Bolt TB3 is sold as an Extra Strong Premium Quality bolt, is 1/4" in
diameter and breaks at 500 goot pounds. Cost 40 cents

While the testing may not reflect normal torque applied to the bolts, which
one would you buy?