There may be fake Premium Economy cabins/seats out there.... but UA's E+ is not one of them....Why do folks keep including it in such comparisons?
UA themselves don't claim it is anything OTHER than more legroom... and they routinely give it free to their elites... which is not the case with the majority of real Y+'s....
(Like NZ's.. which I rather like...but even as a top level elite on their OWN program I have to pay for it or upgrade into it

)
I think UA should be praised for providing E+ as it is and as they do.. not criticised because it isn't a proper Y+!