Mt. Rainier shots

The Tall Ones and I went out to the lake again today, and since I'm taking this cool online photography course, I took my camera so I could play with my ISO settings and (hopefully) get some great shots of the mountain. So let me know, which one do you like best?

The shot is the same, just the settings are different. There's a subtle difference in exposures. Can you tell? Does it make a difference? Let me know what you think!