As long as the oil actually meets the API specification that it says it is, it's nearly a moot point by the time you get to comparing SN+ oils. The add packs for sure (and most likely the base stocks too although there is no way outside of corporate espionage to find out) are so similar it's essentially same stuff, different jug and label.
Sure, everyone here including myself wax poetic about what our favorite oil is and why (and what makes MY favorite better than YOURS), with 99%+ realistically not having anything more than an opinion to prove it. One or two UOAs doesn't prove anything other than the oil was sufficient for your needs during that OCI.... and since there are many, many UOAs on here showing that QS/QSUD performs admirably, even more so in its price point, should ease any fears you have about using it. It meets all current API specs, VOAs show it has plenty of the good stuff, and UOAs show it stays in grade. All that for less than $4/qt in a 5qt jug, what, me worry? Nope.
Why do you think so few companies report it? In the big picture, Noack is just not a very useful test when looking at the overall performance of an engine oil. So many other factors (viscosity, TBN, film thickness, antiwear adds) are much more important, especially when you're dumping it into your daily driver that never sees sustained RPM or oil temps over 230*F. What oil would you rather have... one you never have to top up over a long OCI but does not protect against wear as well, or an oil that requires 1/2 quart every 1k yet keeps all of the moving parts protected as best as can happen?
