Vue.js: What is the difference between v-model and v-bind.sync in Vue?

1<template>
2    <Child v-model="value" />
3    <!-- Equivalent to -->
4    <Child :modelValue="value" @update:modelValue="value = $event" />
5</template>

1<!-- Vue 2 only -->
2<template>
3    <Child :title.sync="title" />
4    <!-- Equivalent to -->
5    <Child :title="title" @update:title="title = $event" />
6</template>