I notice that a lot of Unity-made games have -- as you put it -- much snappier response timing and animation and inputs are far more precise. It makes sense why devs making platformers and side-scrollers prefer Unity over Unreal as one of the reasons for that. I think it's also because of so much of the bloat in the Unreal packaging due to having to support a lot of third-party plugins and libraries, most devs just settle for the default physics instead of fine-tuning it as you mentioned.