Because several people have asked what the difference is, I give you my reviews on Sugar Cookie.
Sugar Cookie 2004 has a definant cinnamon and spice smell to it. When wet on the skin, the spicy smell is the strongest note. Dry, it does smell sugary, and then it fades into the obligatory foody scent that a lot of the foody oils turn to (like Beaver Moon for example).
Sugar Cookie 2005 smells more like cookie dough and rum. I kid you not. It smells similar to Egg Nog, but with a dash of alcohol added. I can detect a slight bit of spice, but it's not like the 2004 version. Other than both scents having a sugar smell on dry down, they don't smell that much alike.
All in all, 2004 smells more like the sugar cookies my mom used to bake and that I love. 2005 smells like someone made sugar cookies with egg nog.