Carl, the "hard" terminology with respect to Pine bedwood has nothing to do with the "quality" of any breed or sample of wood, as varied by the characteristics or age of the individual tree or its milling .... as pointed out above, "hard" Pines are a family [Pinus Pinus] that includes Yellow Pine, so calling the bedwood "hard yellow pine" is using a redundancy for advertising purposes, "soft" Pine is a different family [Pinus Strobus] .... that's what you should have learned from the College of Natural Resources, Forestry Department - if you don't like Wikipedia, try the
Southern Forest Products Association, as some use the more appropriate name "Southern Yellow Pine" for the bedwood [and note there are 10 different species] .... yes, Yellow Pine wood is "harder" than some other woods, but that has little to do with the use of the term for bedwood, Pine is still a "softwood" lumber
Bill