I think the selling point for the Chris Kings would be the star rachet and instant engagement vs standard pawls. It's been a long time since I road a CK hub, but, I remember remarking on how I never realized how much slack there is in a standard Shimano freehub until I experienced the opposite. Apparently the newer CK's can be lubricated to minimize their swarm of bees. I'm not sure if you can silence a Hope hub. They make a racket.
When it comes to weight savings, I'm all about focusing on rotating weight over static. But, in the case of freehubs, being very close to the center of rotation, I don't know if I see the advantage. As a clyde that climbs a reasonably amount and one who has previously stripped or jammed up freehubs, I would lean toward the steel component.
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Birth Certificate, Passport, Marriage License Driver's License and Residency Permit all say I'm a Fred. I guess there's no denying it.