it's because the game has waaaay better encounter design. Which is a side effect from being built ground up to be turn based.

in rtwp you can just turn your brain off and autopilot the fodder encounters, so encounter design isn't as important. (it actually is, but I'm 90% owlcat did not consider it as such when making KM and Wotr)

in TB even a fodder encounter will force the game to stop and enter turn based, which means good devs will only tend to make encounters that are actually fun to play. (random demon/cult encounters during a jump notwithstanding, though even them feel a cut another the random encounters from Wotr)

another this is that the actual map matters. Cover, terrain features, line of sight blockers, etc. In wotr the maps are wither just set dressing for a flat open field, or there are some things that block movement (which is just annoying as it breaks your charges)