What is the difference if I pass the parameter to the function of the event or not, because if I do not put it, it will do the same job if I put the parameter Examples

let btn = document.getElementById("btn");
let p = document.getElementById("p");

function draw(x, y) {
    let div = document.createElement("div");
    div.innerText = 'x';
    div.style.position = 'absolute';
    div.style.top = y + 'px';
    div.style.left = x + 'px';
    document.body.append(div);
}

document.body.onclick = funcation(event){
    draw(event.clientX, event.clientY)
}

document.body.onclick = function () {
    console.log(event.clientX, event.clientY)
}