The NSD has a more rugged appeal.
cheers
PAt
Between the EWA and the NSA, I choose the NSA, for its cleaner dial, smaller size.
Did you try the EWA " Tide to Time " version ( titanium case, blue and black dial 
?
This is a nice option, but the size is the same ( 46, 3 mm ) and will not suit everyone's wrist.
Best,
Nicolas
Let me tell you my personal -and perhaps isolated- opinion about sizes.
I always have thought that enormous watches are made only for fashion people. Obviously I´m convinced that JLC make watches for people fallen in love, but always is possible they allow concessions to fashion.
I like much more tha navy seal due to the reasons explainned before by the other forum members.
Best regards.
and I like the large bulky size and busy dial. I love watches that are substantial. Others here prefer smaller watches with cleaner dials. There is no right or wrong answer. So it comes down to a matter of taste. Certainly the EWA has many good features to offer like 100m water resistance, enhanced shock absorbancy, world time and most importantly, the alarm function. Also its ceramic bearings on the rotor allow the watch to be easily (automatically) wound, more so than than rotors without the ceramic bearing. I would say that the rotor rotates with about half as much energy when I compare it to my other automatic watches that do not have ceramic bearings. Your mind may say you want both watches, and then listen to your heart to determine which of the two watches you want. Good luck on your choice, but either is a winner.