The 2nd one is F11, ISO 100, 1/250, FL 250. Exposure is about right on this one... first one is overexposed.
Looks like you missed focus, or maybe camera motion blur. You could shoot at F8 (plenty of DOF at that distance), and increase your shutter speed a bit if you are handholding. If you are on tripod, use a remote or self timer. Focus using live view in magnification mode... or use AF in spot focus mode. Meter in spot mode too if your body will do it.
As Desi mentioned above, you will get more detail in a less than full moon!