I believe the beef the OP has is....not comparing one car to another in terms of MPG, it's the disparity of "claimed" MPG vs. real life.
Why is it that some cars can actual MPG's close to their claimed MPG's while the CVT is so far off.
This could be considered misleading/fraud.
Thus the expectation of "claimed" dropped to "expected real world/actual" still does not match "actual real world" MPG's.
This takes into account premium vs. regular, AWD vs. 2WD, etc. It's NOT a comparison of one car to another, it's claimed mileage vs. actual.
We all know it's difficult to get what is claimed, so we accept we will be some amount less.