ive has both the blue 41.5mm like the film worn spectre watch as well as the 38.5mm skyfall version and much preferred the smaller skyfall version. It never got as much wrist time as it deserved though so I moved them both on. Short answer is that either one would make great daily wearers.
So the Spectre improvements: master co-axial and removal of date window borders?
Master Co-Axial 15000 gauss might be an improvement for some, but not for others. While most I know prefer the frame around the date window. I'm fine with both, but the cleaner look without the frame does look good as well.