I can agree with the graph, as well as you, in MOE having more subbass, I really find MOE sounding darker up top past the low treble than M80. Apart from extra bass and treble, upper mids boost makes M80 sound somewhat nasal versus HDH50, HD25, and other headphones with a balanced midrange. MOE has a little more boost. I think that this needs to be mentioned for those who don't like it and are considering MOE or M80 but cannot audition them before buying. MOE should sound more forward in the mids, but the real cause is the reverb in the bass chambers surrounding the primary chambers housing the drivers in each cup, I found out from experimentation.