As there are many people, here, who love their JLC Chronos, being EWC, Squadra, Reverso, Amvox II, or Duo Metre.
Personnaly, I own 2: The Amvox II and the Duo Metre, but I had the opporrtunity to try many times the EWC, and the MC Diving Chrono.
So, yes, you will have some serious issues to choose betweem all of them.
It really depends on what you're looking for, and what you love.
The EWC is really appealing with its strong look, and its World Time complication.
The Diving Chrono is like a tool watch, which is also very good for an every day life.
The Amvox II is the most original one, without any pushers, and its funny look.
The Duo Metre is one of the nicest Chronos ever made ( all brands included ).
And the Reverso Chrono, in its rose gold version is like a jewel.
Among all those you quoted, I would go on the EWC or the Amvox II.
Aaah, you didn't seak of the amvox II?
I may be biased...LOLOL
But I also may consider it...
One little thing, be careful with the size, as the EWC is 46,3mm big...Not for everyone's wrist, while the MCD Chrono is 44mm.
size apart, I would defintely go on the EWC, if you don't consider the amvox II.
Maybe a bit more polyvalent than the MCDC, and the World time complication is the cherry on the cake.
Here is a Wrist Shot pic I took with Simon's watch:
Keep us updated, my friend.
Best.
Nicolas