I'm not an imager so I dont really know what I am talking about... but...
....I see what the other critiquers mean about the improved 'detail' in number one...but to my untrained and inexperienced eyes the resolution of the details included in the 1st image is decreased (spatial resolution that is); some of the finer parts of the image look slightly bloated to me. Although there are 'more details to see' in the first image, I personally prefer the second as there seems to be less artefact (noise) and it is crisper. The faint fuzzy is fuzzier in the 1st.
Cheers, Kerrie