I totally agree with shotgunshane. I purchased a pair of 1XBs from a fellow Head-Fier at a very generous price because I was having comfort problems with my MG7 Atrios, and though they feel like they have comparable sub-bass, the 1XBs don't compare in any other aspect. My musical tastes focus around electronic, hip hop, rock, jazz, and folk.
They're heavier (though maybe sturdier) due to their metal body, have a larger body (which was already a problem for my ears with the Atrios), have a more tangle-prone cable (rubbery, not plastic-y), and suffer from driver flex. From a sonic perspective, their mid-bass is so huge that it overwhelms the rest of the spectrum. To me the Atrios have a very pleasant, natural sound and their bass emphasis is focused on extension and accuracy. The 1XBs on the other hand, are all about quantity, choking out so much of the mids and highs that when I switched back to my Atrios I was amazed at how open and uncongested they sounded.
If you're only after the largest sum of energy possible at the lowest frequencies possible (like maybe for movies?) then the 1XBs are a shoo-in, but the Atrios give what I feel to be a much more musical, natural representation. That's not to say that I couldn't get used to the 1XBs and appreciate them with some brain burn-in, but if I had to choose one or the other I would definitely go for the MG7 Atrios.