I like day shot accept for the ghosting ppl there. There's also a little blue-ish color cast on the day shot (middle left where the mountains are, see if you can remove it). It looks like the sun is coming up where the end of the pier is (not sure). Maybe you can try different compositions like letting the pier guiding the morning sunlight. is this 10-stop ND? Too much light distraction and the star trials for my liking on the night shot. Both are great shots. I really like the smoothness of the water. Calm and peaceful...
Al,