Why is Wraith King more popular in the meta than Chaos Knight?
They both have stuns. At level 4, Wraith King's stun is 2 seconds. Chaos's stun is 2-4 seconds. So, no matter what, it won't be any less of a stun. Edge: Chaos Knight
They both have a passive big hit ability. Wraith King's is 15% crit with extra crit damage. Chaos Knight's is 10% with extra crit damage. At level 4, both have an extra 300%. Edge: Wraith King