What is the Difference Between `new object()` and `new {}` in C#?

First of all i searched on this and i found the following links on Stack Overflow:

• Is there any difference between `new object()` and `new {}` in c#?
• Difference between object a = new Dog() vs Dog a = new Dog()

But i'm not satisfied with this answer, it's not explained well (i didn't get it well). Basically, i want to know the difference between new object() and new {}. How, they are treated at compile time and runtime?

Secondaly, i have the following code which i have used for WebMethods in my asp.net simple application

[WebMethod]
[ScriptMethod(UseHttpGet = false)]
public static object SaveMenus(MenuManager proParams)
{
    object data = new { }; // here im creating an instance of an 'object' and i have typed it `new {}` but not `new object(){}`.
    try
    {
        MenuManager menu = new MenuManager();    
        menu.Name = proParams.Name;
        menu.Icon = proParams.Icon;
        bool status = menu.MenuSave(menu);
        if (status)
        {
            // however, here i'm returning an anonymous type
            data = new
            {
                status = true,
                message = "Successfully Done!"
            };
        }
    }
    catch (Exception ex)
    {
        data = new { status = false, message = ex.Message.ToString() };
    }
    return data;
}

So, (as you can see in comments in code), How new object(){} and new {} differences?

Is this even the right way that i have write the code? Can you suggest a best way for this code?

I know, i can't explain it well and i'm asking alot, b