Go to the Schaeffer's website, print out the Technical Data papers on the Supreme 7000 and the MolyBond X200 and compare for yourself.
X200 has a higher TBN, higher Sulfated Ash Content (1.5% compared to .95%) and is more Shear Stable per ASTM D-3945. Viscosity loss due to shearing for the X200 is 7% while Supreme 7000 is 9.96%.
Supreme 7000 does have a higher HTHS number which is 4.3 compared to X200's at 4.08.
FWIW, the MVR Borderline Pumping Temperature per ASTM D-3829 for MolyBond X200 is -15 deg F.
ozzmann, use what you want. Either oil will perform well. If I wasn't running Schaeffer's I would use Delo but since the price difference is only $2 per oil change between Delo and Schaeffer MolyBond, I went with Schaeffer's...
My .02..
Rob