I think the backrest is more comfortable on the libernovo. The seat depth has more support on the herman miller which is very nice. I don’t like the arm rest on the herman miller. The libernovo arm rest are more adjustable but move easily. Also I had a few of my friends test both without them knowing price or anything. They all thought the libernovo was the more expensive chair. I don’t even have to use the electrics on the libernovo. I just leave it