I own both the Melomania P100 and the Sony WH-1000XM5, and I absolutely do not agree with the review. In my experience, the P100s offer more clarity and presence compared to the XM5s, with a noticeable difference.
Depending on the genre, that 'presence' can be quite substantial. For example, when listening to David Sanborn – Run for Cover (Live) or Bobby Womack – If You Think You're Lonely Now, the P100s perform above and beyond the XM5s. The sound is much, much warmer, and the presence is amazing. I understand that headphone reviews can be very subjective, but sometimes the difference is so clear that it shouldn't be.
All I'm saying is, if you can, try them out—try both if possible.