on this JLC forum and you will see a brief discussion of the EWA as well as some pictures.
They are similar watches in that as you noted they both have the air shock absorption and the fast strap change mechanism, and I think they are roughly the same size, although I think the EWA seems a little bigger because of the "fin" on the 9 o'clock side. The big difference is in the overall look and functions. Which is more useful to you -- the alarm or the chronograph?
I think you are right that the EWC generated more interest and discussion when it was launched than the EWA has because the EWC was launched as sort of the flagship model of the Master Compressor series and featured some innovations that have now been around for a while and are incorporated into the EWA. I think that because the EWA features the same alarm mechanism that the latest hot model, the Polaris, does, the EWA did not get the recongnition for this new alarm design as the Poaris certainly has. So, I kind of think the EWA has gotten a little lost in the mix coming between the EWC and the Polaris, but maybe some others here have a different perspective. It is a great watch if the alram function is useful to you especially when you combine it with its ruggedness and the worldtime function
In any case, just decide wich one looks better and is more useful to YOU.
respo
