What is the difference between the two block of codes?

Cat c1 = new Cat();
Cat c2 = new Cat();
Cat c3 = new Cat();
c1.name = "To";
c1.age= 8;
c1.weight= 10;
c1.strength = 85;
c2.name = "Tm";
c2.age= 1;
c2.weight= 60;
c2.strength = 5;
c3.name = "Tom";
c3.age= 18;
c3.weight= 100;
c3.strength = 65;

Cat c1 = new Cat("To",8,10,85);
Cat c2 = new Cat("Tm",1,60,5);
Cat c3 = new Cat("Tom",18,100,65);