To be fair, as far as I can tell, this test was comparing a new Panny OLED, cherry-picked and optimised by Panny technicians (who clearly knew what the exaggerated criticisms of the LGs has been), against a PREVIOUS generation LG, not set up by Panny (or LG) technicians.
The report says it was clear Panny has been listening to the criticisms of the LGs. You'd have to suspect LG might have been, too.
And finally, even given all of the above, the improvements in the Panny did not appear to be huge. At least nothing like as huge as the price difference.
Steve W