The bridges and such are basically the same. Albeit, the running seconds on this is more a 3 starred propeller versus a single second hand at 10. The main plate is scalloped as you can see instead of the rehaut/chapter ring on the normal openworked pieces...
each of those nuanced differences that you pointed out make a huge difference! When I looked at it, I felt there were differences (besides the obvious sapphire) that elevated this in my eyes, but I couldn’t tell what. But as you highlighted each component...