Okay, Overkill, let's say I buy all of your points that Product Data Sheets, UOAs and VOAs give only a vague picture of any oil's performance.
Let's instead focus on certifications, since you state that oils meeting the same certifications are likely to yield similar performance.
QSUD and MSS are both API SN, ILSAC GF-5 energy conserving oils, as is M1, all in the 5W-30 grade.
In comparing the 5W-30 grades, QSUD meets two fairly tough high temperature standards, Honda HTO-6 and GM 4718M, as does M1.
MSS meets neither.
QSUD is Dexos 1 approved, as is M1.
MSS isn't.
The QSUD 5W-30 has a viscosity index of 172, as does M1, while MSS has VI of 162.
QSUD also has considerably better low temperature performance than does MSS, if you believe the numbers from XOM and SOPUS.
Overall, QSUD appears to be far more comparable to M1 then MSS is to QSUD, judging only by the certification criteria you site as being more meaningful than PDSs, VOAs and UOAs.