要比较用户特定自定义属性，可以使用条件语句或函数来实现。下面是一个使用条件语句的示例代码：

# 定义用户自定义属性
user1 = {
    "name": "John",
    "age": 30,
    "gender": "male",
    "occupation": "developer"
}

user2 = {
    "name": "Jane",
    "age": 25,
    "gender": "female",
    "occupation": "designer"
}

# 比较用户的自定义属性
if user1["age"] > user2["age"]:
    print(user1["name"], "is older than", user2["name"])
elif user1["age"] < user2["age"]:
    print(user1["name"], "is younger than", user2["name"])
else:
    print(user1["name"], "and", user2["name"], "are the same age")

上述代码比较了两个用户的年龄属性，并根据比较结果输出不同的结果。

如果要将比较逻辑封装成函数，可以使用以下示例代码：

def compare_users(user1, user2, attribute):
    if user1.get(attribute) is None or user2.get(attribute) is None:
        print("One or both users do not have the specified attribute.")
        return
    
    if user1[attribute] > user2[attribute]:
        print(user1["name"], "has a higher", attribute, "than", user2["name"])
    elif user1[attribute] < user2[attribute]:
        print(user1["name"], "has a lower", attribute, "than", user2["name"])
    else:
        print(user1["name"], "and", user2["name"], "have the same", attribute)

# 调用函数进行比较
compare_users(user1, user2, "age")
compare_users(user1, user2, "gender")
compare_users(user1, user2, "occupation")

上述代码将比较逻辑封装成了compare_users函数，可以通过传递不同的属性进行比较，并输出相应的结果。