The main differences were in terms of quality. I don't want to appear being nitpicky of others' work - especially because these makers are all obviously at the top of their game - so if you'd like details on the different helmets, DM me.
There were a couple that felt flimsy and also had warped/pinched mandibles that maybe others wouldn't notice, but bothered me.
I was looking for size to fit my large noggin but also not look too large, a quality, durable build that would last many years of troops, and a finished paint job that looked screen-accurate. Nomad fit the bill for the criteria. I have two from Sean, a weathered version and clean version.
I will say that judging by the pics, Marcus looks promising.
