Dying Light 2 features an all new armour system and an RPG Class system to go alongside it. You have the ability to prioritise certain stats and spec your character into a specific build (with the ability to change this at any given moment by simply changing your armour). This video details all of the different stat boosts you can possibly obtain via armour and which of the 4 classes those stats are tied to.
Link to the venn diagram infographic: https://i.imgur.com/M9p8vrp.png