Although I am not usually drawn to a bigger size, this one is an exception to the rule.
On the practical side, the bigger dial allows more space between the countries. From the bottom of "Moscow to the bottom of Dubai", the "leading" is a little more spacious, giving it slightly more breathing room. To me, it makes it less busy and more legible.
Gotta love the scissor hour hand. Makes it easy to distinguish and easier to read, especially in a lower light situation.
Love both dials as it displays Craftsmanship as well as beauty, but the lighter dial really opens up the entire piece, whereas the 5110's blue dial seems to "close up" the piece. Perhaps it is because the 5130's rays appear to be emanating "outwardly" and blue, guilloché looks more like concentric pattern?
As my eyes are starting to fail me, that's my 2¢ worth.
Aloha,
Bob
ps
Thanks for the great pics, Nicolas!