I own an Olympus XA and a few Yashica rangefinders. The Electro 35 CC compares better to the Oly XA than the GSN does.
35 CC:
+ :very nice lens (f1.8, 35mm) --> great combi of fast lens and nice focal length
+ :nice rangefinder
+ :very well build
- :no shutterspeed display
- :hard to find
Olympus XA:
+ very nice 35mm lens, though slower than Electro CC
+ very tiny and still a true rangefinder
+ nice rangefinder and shutter speed display (though sometimes hard to read)
- Mickey Mouse appearance
The Electro 35 CC is hard to find. I found one though

for 25 euros. Both the XA and CC are great cameras. The CC is compacter than the GSN and has a 35mm lens (the GSN has 45mm). The GSN is bulky but it's still a great camera with a great lens and very well built.
I also own a Yashica Lynx 14E. It's a truly GREAT camera with its f1.4 lens, but it's totaly different from the XA. It's about 3 times bigger. In fact, my Pentax ME SLR with 50mm is small compared to the Lynx.