❔ Initializing an object

Hello, what is the difference between these two lines?

var p = new Point() { X = 42, Y = 13 };

var p = new Point() { X = 42, Y = 13 };

and

var p = new Point(42, 13);

var p = new Point(42, 13);

I know that the first allows you to initiate an object, but I don't understand the difference