I haven't played all of them but I think it mostly comes down to the way the combat works. For example, Divinity: Original Sin has turn-based combat and even a person like myself who dislikes turn-based combat found a lot to enjoy in it. You can set up your party with different skill types and take advantage of the environment to help win the day.

Then games like the Pillars of Eternity games and Pathfinder: Kingmaker (haven't played WotR yet) have a more classic RTwP system a la the first two Baldur's Gate games or even Knights of the Old Republic or Dragon Age: Origins, but with a lot more features that make combat more enjoyable. This is particularly true in PoE2, where I can use a broad plethora of skills in my party setup that allows me to really manage the way we face the fights. While you're trying to learn the system, it's pretty hectic but once you understand the way the system works and once you get to understand your party members, it becomes second nature and you really are able to use tactics to properly set things up.

Overall, I'd say PoE and PoE2 have my favorite combat systems among any isometric, party-based RPGs. I'll never forget the time I accidentally ran into an enemy that was way more powerful than my party yet, because of wise management and tactics, I was able to take it down after a long, epic fight. You wouldn't expect some isometric RPG with RTwP combat would get your blood pumping but that fight taught me otherwise.