You might find the opposite is true actually. I saw something (maybe on youtube?) recently where someone tested chain wear on a range of Shimano chains by setting up a jig and running it for ages, measuring it at intervals until it got to .5 wear (which is when most recommend changing the chain).
The XTR/Dura Ace chain lasted the longest. No only that, on a dollar per kilometre basis it was also the cheapest chain overall!
They put it down to the added treatment or coating on the rollers that the other chains don’t have.
No I don’t think so, that would be a good test though I agree.
Based on the fact that the result was put down to the physical difference in the chain material, I’d think that it would still last longer, but maybe it wouldn’t turn out to be cheaper by the km, as potential the grime could rip through a coating pretty quickly.