Well, yes and no.
Playability wise, I would say no, not really. I think the overall feel of POG is pretty much there in terms of stiffness at ball contact.
But one thing I noticed quite a bit was the affect on my arm. After a few hard sets with the POG mid, I would feel it in my bicep and sometimes a little tinge of pain in my elbow. I tried all sorts of string setups and the results were mostly the same. The EXO3 Graphite mid (and 100 which I played with for a while also) is a joy on my arm with any string setups I've tried. I can play several days in a row without that arm fatique I got with the POG mid. So maybe that's where the flex difference comes in, I don't know.