Preferred them to :   SR225 - little bass quantity, uncomfortable SA5000 -  body missing, little bass quantity, resolution is too much,  great for electronia T1 - M50 had a more fullbodied sound while having less resolution   Cans that were close: HD650: veiled,great tone&mids, better resolution, less bass, needs top amplification, better comfort DT990: great treble energy, better resolution, but bass & treble can get tiring/ too much quickly   recessed mids excepted - the m50 have a much better balanced sound with better imaging...