KIEV shutter sound like "coo-oop", FED5B sound like "clack" loudness wise is comparable.
KIEV rangefinder is larger so easier to see.
FED5B has eyewear correction so I can view without wearing glasses.
KIEV is easir to focus using the "Contax hold" method but I find my middle finger too short
FED5B advance level is good! KIEV advance knob = sore thumb.
Setting shutter speed is easier on the FED5B too being smaller. The KIEV shutter is on the cocking knob so have to grab the big knob and lift and turn to the appropriate speed. FEB5B is easy, thumb and index finger will do.
FED5B film counter is nicer then KIEV. Wearing the KIEV around your neck look cools. Very classy being a Contax design.
I show my FED5B to 2 friends, same reaction : "wow! nice build, heavy and substantial, cool!"
The Industar 61 LD len on the FED5B is really good! I just shoot another roll of Fuji400 (argh...why not the 100 for finer grain), collecting the print tomorrow from my same old lousy neighbourhood lab. Will post some here after a scan some sample.
The million dollar question : Which one would I prefer to use?
The FEB5B!
Although I have no reservation to shoot with either one, everything on the FED5B is enjoyable. Only thing I miss on the FED5B is 1/1000.