Old thread, but it shows up very high in Google results when searching for "Sony MH1 vs Brainwavz M2" or similar terms.
I own both of these and the Brainwavz M4, although the right speaker on my M2 is dead.
+ It’s louder than MH1 at the same volume
~ High volume boomy bass (intense, but overblown)
− Sound feels somewhat cheap and inaccurate when compared to the MH1
− Uncontrolled sound at higher volumes
+ Much cheaper (6€ where I live)
+ Sound is incredibly more detailed than M2
~ Bass is clean, present, more controlled, but not as impactful as on M2 and M4 (hard to tell though, because I can’t play these at the same volume as M2 and M4)
~ Asymmetric cord
− Cable is not really suited for walking / running, might have to recable
− Low volume; I can turn up the volume to max both on my Asus Xonar DG sound card and on my Meizu M6
+ More detailed highs than the M2 (but not nearly as detailed as MH1)
+ Louder than MH1
+ Cable is light
+ Comfortable to wear
− Muddy sound, going from these to the Sony MH1 is like taking off noise insolation plugs
− Flimsy cable, very thin and seems like it will break easily
Altogether, M2 and M4 do have higher bass impact, but it distorts the high frequencies. MH1 provides a much cleaner, more natural and detailed sound, and I prefer them by quite a lot.
M2 sound a bit sharper than M4, but also have more distortion. Hard for me to decide which of these I prefer, but I don’t really care anymore since I have several MH1, haha.
If MH1 would cost twice as much as M2 / M4, it would be hard for me to decide, but as it is, MH1 outperforms them in both price / value and sound quality. So unless you absolutely need extreme bass volume that damages your eardrums, sound-wise MH1 should be the better choice.
Sound-quality: MH1 >>> M4 >= M2
Value: MH1 >>>>> M4 ~ M2
Edited by Kadano - 3/8/15 at 7:30am