No frequency response is published so no comments other than that manufacturers can easily publish fake figures - are you going to take them to court? Mostly people rely on forums and circles to get real life feedback about such things.
That frequency response appears very fake, let me show you a realistic FR from a "full range" driver.
https://seas.no/images/stories/prestige/pdfdatasheet/H1597-08_FA22RCZ_Datasheet.pdf
Typically, full range drivers used are smaller diaphragm <5" that can do linear justice to 100-8000 Hz spectrum. The lower frequencies can be boosted using box/tube resonance.
Yes, the published figures appear closer to real life here. IF you observer keenly, there is a sudden rise around 1200 Hz and then onwards the linear-ness is a disaster. The dip at 5500 Hz means it becomes practically useless above this frequency. This is good enough though for guitar amp modeler (check out the stated purpose) because it has emphasis exactly where needed 2000-5000 Hz.