Having curly hair myself I can tell you that it is perfectly normal for your hair to be different from one day to the next. I to be very constant in the way I treat it and the way I apply the styling products but some days it looks great and other days it does not.
If the humidity in the air changes from day to day, you will get different results too.
My favorite mousse for great curls is White Sands. It makes neat loopy curls. I reviewed it in this article:
White Sands - Product Review The only problem is that it is not available in the area where I live. It may be available in your area. There is a list of distributors on the web site.