为什么我应该使用 Any 方法而不是 Count 方法？

为什么我应该使用`Any()`而不是`Count()`呢？如果我们看一下msdn的示例：\n

class Pet
{
    public string Name { get; set; }
    public int Age { get; set; }
}
class Person
{
    public string LastName { get; set; }
    public Pet[] Pets { get; set; }
}
public static void AnyEx2()
{
    List people = new List
        { new Person { LastName = "Haas",
                       Pets = new Pet[] { new Pet { Name="Barley", Age=10 },
                                          new Pet { Name="Boots", Age=14 },
                                          new Pet { Name="Whiskers", Age=6 }}},
          new Person { LastName = "Fakhouri",
                       Pets = new Pet[] { new Pet { Name = "Snowball", Age = 1}}},
          new Person { LastName = "Antebi",
                       Pets = new Pet[] { }},
          new Person { LastName = "Philips",
                       Pets = new Pet[] { new Pet { Name = "Sweetie", Age = 2},
                                          new Pet { Name = "Rover", Age = 13}} }
        };
    // 确定哪些人有非空的Pet数组。
    IEnumerable names = from person in people
                                where person.Pets.AsQueryable().Any()
                                select person.LastName;
    foreach (string name in names)
        Console.WriteLine(name);
    /* 输出结果:
       Haas
       Fakhouri
       Philips
    */
}

\n如果我使用了以下代码：\n

IEnumerable names = from person in people
                            where person.Pets.Count() > 0
                            select person.LastName;

\n它会得到相同的结果！（我不认为它是为了简短或其他什么）是否有`Any()`的特性？