Understanding Data Handling in Svelte with Inertia.js: When to Use export let vs $page.props

[kevin82222]

Hello,
I'm using Inertia + Svelte in my side project, but I'm not quite clear on the differences between the two methods of receiving backend data.
In Svelte, we can use export let propsName to receive props passed from a parent component.
However, in Inertia.js, there is another way to receive incoming data, using $page store.
Could you explain when to use export let ... and when to use $page.props? What are the differences between these two methods?

Thanks