Rust explicit type annotation vs integer literal suffix

As we know, there are two similar ways of explicit type hints in Rust:

let val: i16 = 777;
// and:
let val = 777i16;

My questions is: what are the benefits of both of them? (Let's only look at the case of literals, not runtime values). They seem identical to me.

I find using the literal annotation (777i16) is often useful when creating an array or vector, and passing it to a function that accepts multiple types. For example

fn take_value<T>(input: Vec<T>) {
    // ...
}

fn main() {
    take_value(vec![0u16; 1024]);
}

Otherwise I prefer the explicit annotation for readability.

Rust explicit type annotation vs integer literal suffix

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