Among dexos1 Gen2 oils, there usually is little evidence of any substantial differences in actual performance since we don't have access to the SN GF-5 dexos1 Gen2 test results for each oil. Its all secret.
That said, there is some evidence that the long-lasting products "Extended Performance" or "Annual Protection" Mobil1 oils are superior to other dexos1 Gen2 oils due to their higher PAO percentage and XOM patents & claims on anti-oxidant chemistry enabling long OCI's by keeping additives alive and kicking for cleaner and low-wearing engines.
About UOA results, remember those don't show piston cleanliness (ring sticking potential), which is really what separates many oils from each other within any one given spec level.
You could also look at how Pennzoil synthetics have held up piston cleanliness results over the years to say there is a difference even between comparably spec'ed oils. Their GTL GroupIII+ base oils are thought to be quite good.
Likewise you can see Valvoline spelling out the differences between their 3 flavors of synthetics, with synthetic MaxLife winning on several fronts even though all 3 of their full-syn varieties are spec'ed about the same. Differences there? Yes, very likely.