I really liked the Rognir Dynamic, in the end I preferred listening to music with the LCD-X, so the Dynamic went back.
I couldn't do much with the GH40, the headphones were infinitely comfortable, the tonality was great, but the bass was applied too thick, the most unpleasant thing for me was the stage without any front localization, somehow 2D. This was my perception, but because we all hear differently….
Ultimately, I understood the GH40 as headphones for on the go, which the GH40 also confirmed with the short, thin cable that came with it.
If in doubt, listen before you buy...