I love the Knox model, but it has more to do with the C7 truck than the deck. I also put two more spacers on it because I kept rubbing the wheels really badly.
It all depends on what you're going for.... on a different tip, the ...Lost surfskate is pretty fun too and a completely different concept.
Think the cx has a slightly less extreme of a turning radius and no thrust bearing. My thought is that the cx truck was for someone wanting to do more hp park skating while still having a surfy feel. I like carvers but prefer skating a regular deck in the park.