There isn't really a definitive way of saying one brand is more durable than the other, but if it helps....in my personal experience my ON3Ps have stayed in very good condition through some brutal treatment. I'd say they are significantly more durable than the average ski and I've had a blast riding them. I have very little experience with Moment.
"For me, my family, my friends and skiing, that is for me. That's my life. The joy I get from skiing... that's worth dying for." - CR Johnson
Slope Style Ski Shop, Main Street Breckenridge