Other than similarities between them, I would prefer to think about the preferences of the users of both:
I guess (and there was a bunch of threads dealing with it) many of Us RFF members prefer the following elements:
Fine writing instruments (old & fine fountain pens)
Fine mechanical watches
Mechanical and old cameras
Fine cars and motorbikes
Old but trusty analog audio equipment
Old planes and ships.
This may demonstrate that we share a common profile of personal preferences.
All the above mentioned elements also share something in common :
they are old designs, made in a time where things were made to last almost forever, simple to operate and sometimes limited, but with a definite character that make them unique, and then collectible items also.
That´s what (IMHO) links a Fed with a steam loco (as well as many other cameras and items other than those I mentioned before).
Besides, any Fed (or any other mechanical non automatic camera) requires of the highest personal skill of the owner/user to unveil it´s full potential.
A steam loco, as well as any of the items I mentioned before requires the same.
This was my 2 cents for the thread.
Ernesto