Chris King use to be the go-to headset, but Cane Creek's 110 upped the game and Chris King hasn't so far answered back. But the CC has more seals than the CK plus the CC has extra seals for the cups. The main thing is that the CC supports and stabilizes the steerer tube better than the CK with a split compression ring the CK lacks, which has been a telling thing with the CK as steerer tubes will show wear after time because all CK uses is a rubber O ring. Plus the CC now has a lifetime warranty, the one I got has a 110 year warranty of which there is 102 years left on the warranty, but the CC has a 10 year warranty the last time I checked.
I'm not sure what is happening with headsets anyways, they are a pretty simple device, I have headsets made back in the early '80s with over 150,000 miles on them and never had any issues, yet the modern ones like the FSA Orbit Extreme Pro haven't been lasting long at all, I've heard a lot of people on the internet getting only 2 to 5 years out of them. Geez I have kids bikes from Walmart that the headsets lasted longer with more abuse then the expensive FSA did. So now the industry wants you to buy top dollar headsets in order for them to last virtually forever?
Everywhere you go on the bike forums the consensus is the CC 110 is the best one over the CC.