The king has 72 engagments whereas the echo sl has 108.9
My old king was run dry and had realy bad drag
I've been through my fair share and free-hubs and FFW (profile hub, Chris King, Hope pro II, Eno FFW, Echo SL FFW)(£792 total ) and the echo does it all best for me no need to maintain it, NEVER! skipped (11 months old) cheaper @ £60 sounds good, gives a better feel to the bike, keeps the weight in the middle of the bike and if i keeps eating your jeans get skinny's or shorts!! (or go naked )