Sorry for the late reply Eric. I’ll admit I don’t feel qualified to answer this but I’ll give my opinion :) Looks like every response to a comment is it’s own story, and not a comment. I’ll see what I can do to get your attention after I click publish.
Edit: Looks like it does send as a reply to your comment. I also started a follow up article about this but never finished. I’ll polish it up now and publish it.
I think it depends on what you want to capture. The 24mm is really great for capturing the stars in the landscape, but not so much the Milky Way. I took a photo with my 24mm and the stars are spread out quite nicely: https://www.flickr.com/photos/alexglanville/38254066104/ Whereas the 14mm has everything bunched together like noise.
If you want to photogrpah the Milky Way I vote the 14mm for sure. This will also let you crop it down a bit; I try to keep everything as true to how I photographed the scene but if it came to it, I’d rather have the room to crop than wish I was a bit wider.
I don’t think there’s a wrong choice, but it just boils down to what you want to photograph more: The scenery with the stars as a backdrop (24mm) or the stars with the landscape as a place setting (14mm). If that makes sense.