Bike Radar’s test also puts the Schwalbe Pro One, Goodyear Eagle F1, and Pirelli P Zero at lower RR than the GP5000. BRR has all three of those tires at higher RR than the GP 5000. I believe Aerocoach does the same.
Also, Bike Radar’s resistance figures are a lot higher than BRR’s, despite the fact that their tests are similar in some respects (single wheel, 40 kg vs 38.8 kg load). I’m not sure how else their test parameters varied; BRR has got to do at least one test around 80 PSI, which is the pressure Bike Radar tested at.