It is about Bang for your Bucks. That is why I prefer cheapest certified DexosD, or VW 508/509 0w-20 oil for my hybrid. The price difference from expensive brands, I believe is just Moneterizing strategy, that people willing to pay.
VW 508/509 spec PAO Ravenol VSE or Amsoil costs €70+, value brands like Mannol 7722, Adinnol, Eurolube, Fuchs or Total Ineo for ~35€. Mobil1 ESP X2 or Shell Ultra costs ~50€.
My hypothesis is 1/2 price same spec Oil, and do 5-10k miles OCI is better than 10-20k miles OCI with more expensive oil.
I am willing to pay a bit for something like Valvoline RP, instead of stupid additives or unnecessary flush engine products if I have engine with observable varnish.