Synonyms.
Where you are getting he's college-aged I'm still not entirely sure. Generally, a subwoofer is able to produce more bass SPL than a pair of headphones. If you set the sub gain low enough I can see how headphones could replicate a subwoofer in that sense.
That's why I said "tend" to have better hearing. Implying statistical averages. Statistically, on average, younger people are able to hear higher pitched sounds. Why is this even a debate on a headphone forum? I have no idea how old the founders of the company are, but its kind of a moot point since professionals use microphones and a consistent test rig for tuning headphones, your ears are just to hear if you like them or not. They aren't young, they've had a long history in hi-fi audio. From how you describe how hearing loss works and how you describe the sound of the M1, wouldn't you expect an older person to tune headphones with extra treble to compensate for their hearing loss? Your attempted age-tuning correlation doesn't even make sense.
Once again, I never used this term to describe the M1. If you want more descriptive opinions of how I feel about the T50RP, I think it has a messy soundstage and sounds slightly distorted at higher volumes. The stock pads absolutely suck and I was only "happy" with them after pad-rolling. I ended up returning them because they rattled with sub-bass and are not comfortable.
I've listened to a LOT of audiophile level headphones, more than I can even really remember. Notable headphones I've listened to include the Audeze LCD-X w/o EQ, MM-500, LCD-5, LCD-2, CRBN; Focal I've already gone over; ZMF assorted cans; Sennheiser HD 560S, 650, 800S; Hifiman HE-R9, Ananda, Susvara, Arya Stealth, Sundara Closed, Edition XS; Dan Clark Aeon 2, Expanse, Stealth; Meze Empyrean Elite, 109 Pro; Beyerdynamic DT 1990 Pro, DT 990 Pro, DT 770 Pro w/ lots of Dekoni pads; Dekoni T50RP Mod; Warwick Acoustics Aperio Black, among others that weren't particularly memorable. I liked some of the above headphones as much or more than the VZR Model One. I still really like the VZR Model Ones for what they're made for, I don't know what else to tell you.
Yes, I agree with you. That's why I specifically said multiple times that they probably will not fit in this thread that well, although they can hit fairly hard in sub-bass with generous EQ and power applied. They're just simply not your typical basshead headphones. Whenever I want to do basshead things I use Shuoer S12 balanced with SpinFit eartips and an EQ profile applied in my Qudelix. I wish I could have that kind of in-ear bass pressure out of headphones just for the occasional basshead stupidity. I am still looking for a pair of headphones that can hit like my IEMs after EQ, and have almost decided to just get speakers because I'm not sure if headphones will provide what I'm looking for. I know speakers can provide what I'm looking for.