@Music Alchemist
I just got Yamaha MT220 and compared with my Fostex T50RP MK3. This is 1st initial impression after listening an hour so it can be changed later. My source is 320k MP3 and 16 bit Flac files format with MBA>Meridian Explorer>MK3 | MT220.
Comfort: MT220 wins big time on this one. Fostex has very thin pad and I cannot wear longer than 40 mins so have to take it off. I found MT220 is very comfortable with stock pad and can wear many hours without a problem. I tried with many different earpads (Shure, Brainwavz velour, hybrid) on MK3 to improve comfort but none of them sounds as good as stock thin earpads. Hence, I am sticking with uncomfortable stock earpads.
Cable: I found that MT220 cable is durable and high quality cable but very heavy because it is non-removable thick long coiled cable. MK3 has thinner & lighter but springy cable but it is removable so easy to change cable. Hence, I found that MK3 is better on this department.
Weight: Even. I did not measure the weight with weight scale but feels almost same on my hands.
Power Requirement: MK3 requires lot of power~~~. I need only 20% of power with Meridian Explorer on MT220 but MK3 requires 80~85% of power to listen at same volume level. In terms of power efficiency, MT220 wins big time.
Initial sound impression: MT220 sounds darker, has more bass quantity and slightly hollow sound comparing with MK3 to me. Both cans have great details and can hear all of instruments, and instrument separation & imaging are great. MK3 sounds having higher clarity because MK3 has brighter sound sig comparing with MT220. In terms of bass, MT220 has more bass quantity but MK3 sounds tighter.
High: MT220 sounds slightly smoother and less fatiguing. I prefer MT220.
Mid: Both are great. If I have to pick one, MK3 sounds slightly clearer because of tighter bass and brighter sound sig. I prefer MK3.
Bass: MK3 has tighter and punchier bass and MT220 has more bass quantity but slightly muddy comparing with MK3. I prefer MK3.
This is just my 1st impression after listening an hour so it can be changed later. I have not applied soborthane mod with HM5 hybrid pad change on MT220 as yet.