I think the Q701s are way more comfortable. The LCD-Xs are way heavier, but I knew what I was signing up for when I bought them so that's not really a complaint. The headband on the LCDs have that Q701 headbump at the top of your noggin feeling after you wear them for a while. So I might wrap the headband with a towel later on to see if that fixes the problem.
I have a rather small asian head (2 notches on each side for the LCDs) and my ears also don't poke away from my head like the MAD magazine kid. When I put the LCDs on my head, the tips of my ear slightly touch the cloth on the inside near the drivers. So they get sorta warm after a while, but not to the extent that it's uncomfortable. As a reference, the tips of my ears also veeeeery slightly touch the cloth inside the Q701 earcupsl, but only if I'm moving my head side to side. I think it may be because the earcup foams are super squishy so when I wear the headphone it clamps the drivers really firmly into my ears. The amount of pressure you use to push down a key on a mechanical keyboard will crush that foam all the way to the bottom is probably how squishy it is.
The microsuede feels very comfortable, though. I've had these headphones on for 5-6 hours straight in a really warm house (Michigan is cold right now) and the skin on my face hasn't gotten sweaty or uncomfortable at all.
Also, do make sure to check the sticky material which sticks to the earpads and the transducers on the LCD-Xs. When I got mine, the right side top third of my earpad wasn't sticking at all. I sent an e-mail to audeze support and they sent me a few replacement sticky rings to fix that issue. It took like 2 days total from when I sent the e-mail to when I got the replacement sticky rings so that was pretty neat. I think that might've just been a one time issue though, but who knows.