Vue.js: What is the difference between Vuex and Pinia?

1// Vuex
2const store = createStore({
3  mutations: {
4    INCREMENT(state) { state.count++ }
5  }
6})
7
8// Pinia
9const store = defineStore("counter", {
10  actions: {
11    increment() { this.count++ }
12  }
13})