The candelabra base (mini base) is the small base (pictured) and is designed for most chandeliers, wall sconces, and post lighting. The Edison base is for standard fixtures, comparable to any standard light bulb.
I have a chandelier whose bulbs hang with the base at the top, which is problematic for most bulbs -- they tend to burn out more quickly in this orientation. What is the best CF or LED product for this situation?