It looks better due to couple of reasons I think. New tech from Monolithsoft I fear.
But first, the models themselves. Eyes are more sculpted and less flat on 3 models. The lashes are fully modeled on the eyes.
It‘s running on an updated engine for sure. They fixed the depth of field. It looks great now with no obvious haloing like in Torna. I also notice characters all have a more cell shaded look to them but not quite fully cell shaded. Materials still retain most of their respective textures but it’s more cel shaded than 2 but not fully like BOTW or Astral Chain.
Finally, subtle but I think important update as I just got done watching some second tier cutscenes from previous games just to make sure. The lip sync is much more detailed here (less robotic and puppet like). The older games have mouth flaps move like a sock puppet lol.
One more subtle but very important detail to note is the iris movement.
They twitch this time. Like micro twitching. There are no movements like that in the previous games. New animation tech I think
.