I actually attempted Kingmaker for a hot minute, but after spending an hour or so in the character creator with a second tab up so I could do what I regard to be requisite Pathfinder character creation research, I only made it about 20 minutes into the actual game. It was the voice acting that sealed the game’s fate for me.
I don't recall the voice acting in Kingmaker clearly enough to say whether I think WotR is better. In my view, BG3 voice acting is better than WotR but then I think BG3 voice acting is on the whole excellent so while WotR is worse I don't think it's actually bad even at its lowest, and some of it I think is pretty good or at least perfectly competent. But without my assessment of Kingmaker for calibration, you probably can't take my word for that!
Regarding character creation, WotR does give reasonably easy access to an NPC who can respec your character from scratch (including level 1 class, name, race and everything ... well possibly, though I don't know how that works with Mythic paths as I never tried to change that), as well as your companions from the point at which you meet them. Usually I wouldn't want to be doing that regularly - and in fact it gets really time-consuming at later levels - but given the complexity of the Pathfinder classes, archetypes, etc and the lack of up front in game info about the Mythic paths, I gave myself free rein to rebuild my character if I thought I could do better, and this did take a lot of the hesitancy and fear of buyer's remorse from the levelling up process. I stuck with the same basic concept (kitsune sorceror/arcane trickster) but tweaked spells, feats and mythic abilities every few levels (or sometimes more) until I found a combo that I felt worked. And I certainly ballsed up some of my companion builds and was glad of the opportunity to remedy that!
I mention it here, as if I'd known up front I'd probably have been less worried about how exactly I built my character at level 1 too!
"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"