By the description by Jude it looks like Momentum is bassier than M50 as it's bassier than V-Moda M80 (which he referred to as more neutral) which has about similar bass quantity as the ATH-M50 about 5dB or so boost which I concider "entry-lvl" basshead. I'm guessing Momentum might be more in the 7~9dB bass boosted or so range. It sounded like Jude tried to "mask" the Momentum's relatively huge bass boost with as polite way of wording as possible around that (especially due his reference to this isn't reference material and it's good with bass boost for a portable headphone in a noisier environment), at least that's the impressions I got. I'm personally a basshead and probably searching for this kind of quantity as Momentum has though so I only read it as positive personally as M50 for example has slightly too little bass for my taste.
Thanks man this was a very helpful preview. I don't like if the bass is overwhelming but I do like bass.