You don't understand the limitations of standard measurements and the limitations of the predicted preferences score!My take.
Gethain - A company with speakers that seem kind of difficult to get a hold of, no third party reviews with good data afaik. Some users have posted troublesome interactions with the company. The data Gethain provides looks pretty average and not at all what I would expect from such costly speakers. I get an ATC vibe from them, lot of nice cabinetry but a performance that doesn't really match the price at all with quality measurement data being practically hidden.
Neumann - Speakers are easy to get a hold of, they happily send stuff to this very site for review. Their speakers consistently show state of the art performance at what most would consider a totally reasonable price.
Why is gethain even considered? I'm really bored of these brands that do the bare minimum to show their products are competent. Hell I've learned the playbook from these companies so well I should start my own and just siphon money from people.
Never the less you base your judgement on your false assumptions.
The JBL M2 has a predicted preferences score of 4.9. The JBL LSR 305mk2 has exactly the same predicted preference score. Which loudspeaker do you think is better?
The predicted preferences score is a "prediction" and therefore not the real preference. It has a lot of limitations therefore no one who understands the research, uses it like people like you do. It is only one indicator which most of the times can "expose" speakers which have a pure tonality or some resonances.
The uneducated judgement based on some amplitude frequency response measures or harmonic distortion measures is much worse compared with the predicted preferences score. This was the starting point of the research for the predicted preferences score.
The measure which is most important is the (real) preferences score which can only be obtained in a blind listening test. I have heard that all Harman Groupe speakers provide a better (real) preference score compared with some selected loudspeakers from competitors. So the M2 should be better (at least in the Harman listening room and with the test music they use) than some other similar monitors, despite the average to low predicted preferences score.
The bigger ATC and ME Geithain speakers are very well regarded by almost everyone. This is a good indicator that the real preference score is most likely quite high.