What distinguishes calling the toString() method from simply using it?

After running multiple tests, I have not been able to identify any noticeable distinctions.

const fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits.toString();

Along with

const fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits;

Yet, the outcome remains consistent, providing me with the same results.

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