Comparing Classical Inheritance vs Prototypal inheritance in Ruby vs JavaScript

dog.js

function Dog(name) {
  this.name = name;
}
Dog.prototype.bark = function () {
  return this.name + " says bark bark!"; // Storing things on the prototype will be accessible to all dogs but will only take up memory in a single place once time.
};

var dog1 = new Dog("Fido");
var dog2 = new Dog("Snoopy");
dog1.bark(); // Fido says bark bark!
dog2.bark(); // Snoopy says bark bark!

dog.rb

class Dog
  def initialize(name)
    @name = name
  end
  def bark
    return "#{@name} says bark bark!"
  end
end

dog1 = Dog.new("Fido")
dog2 = Dog.new("Snoopy") # Every time we create a new dog we are duplicating the logic for how it should bark (this takes up more memory for each dog).
dog1.bark # Fido says bark bark!
dog2.bark # Snoopy says bark bark!