It's the exact opposite. Killer's portrayal is considerably above theirs.
Killer's portrayal and feats are much better though?
Leaving aside that Killer has done actual damage to Kaido, we can just compare how they handled the same attack from Kaido.
Kidd gets his robot cleaved through by Kaido's wind scythes:
Killer deflects them like the fodder attack they are:
A previous usage of the same wind scythes had Killer worried about Kidd: