>better roleplaying (dialogues have choices for every combination of Lawful-Chaotic and Good-Evil instead of just one, your kingdom gradually evolves due to your choices while WotR hard locks you into a single specific alignment in the first hour of the game)
>better itemization (something that is rarely talked about, but WotR is infamous for having worthless exotic weapons all over the place and a pretty limited choice of gear overall while in KM it felt like there are more good drops for everyone, especially with the option to commission things from crafters)
>kingdom management >>>> crusade management even considering the time limits. Crusades just suck ass and are almost completely divorced from the core gameplay while Kingdom management involves your party members and gets you constant rewards while granting you a sense of growth
>better enemy and environment variety. 90% of WotR is fight demons in a wasteland or a dark city. In KM you face a much broader bestiary across a more varied landscape. HATEOT can be pretty bad but imo not as bad as endgame encounters in WotR. Just take blindfight and it will be ok.
>cool bossfights with a recurring motif that make you feel like you're moving on from killing a bandit lord to facing the fairy god
Kingmaker is Kino and completely equal to WotR with the Call of the Wild mod that makes most PF classes left out of it playable.