I ordered these alongside the Genelec 8030s to compare. I have a small studio space, about 6x2m2. I sit about 90cm from the monitors, the studio is professionally treated and I used SoundID Reference software to calibrate both pairs of speakers in the space.
Initially, I was drawn to the Genelec's, because everything sounded so good through them. They have a lot of warmth and a great quality of cohesion to mixes. Elements just seemed to sit well together. The Neumann's I found a bit annoying and tiring in the beginning, especially something about the mids. However, after continued listening through multiple genres, I realized that I could hear SO much more detail with the Neumann's. They are transparent, they do not do you or your mixes any favors. When I didn't like listening to them, it's because a mix needed work. The Genelecs had more cushion for subpar mixes, which make them more pleasant to listen to, but not what I need in a reference monitor.
My reference software also shows that the Neumann's are much, much flatter in my space and need very little correction, whereas the Genelecs (though I have read they have a fairly flat frequency curve) needed a lot more adjustment from about 200-600hz and 2-3khz. This could be the way these speakers are responding to my specific room and their position, but the Neumann's did not have issues to be corrected here.
Both the Neumann's and Genelec's are robust and well-made. Both are outstanding options. For my needs, I decided to go with the Neumann's, as they are the most honest to my ears and that is what I am looking for. I expect that if you can make a mix sound full and vibrant on them, the mix will translate anywhere. They have a tight bass, never muddy in the mids, and the high mids and up are clear and transparent.
In the end, your decision should come down to your personal preference and what monitor works for your space and needs. Definitely audition both, if you have the chance!
