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Based on following all discussions/reviews of each it appears that:
Icon > King > Fox
In my opinion most of the people "ranking" the companies haven't actually run all 3 brands of 3.0 on a Raptor. So they don't have a true basis of comparison that is based on comparative driving experience with each product, instead they're just calling the brand they chose the best. Most vendors only carry 1 or maybe 2 of the brands, so obviously they are talking up what they sell because its in their best business interest.
I'm not trying to knock you Big Blue, but your post makes it sound like there is researched data on this site that leads to that conclusion and I don't really think that's the case. It's more like "this is the brand I chose, and I like them, so I think they're the best" types of posts from what I've seen.