There once was a watchmaker who had a hammer.  This was a little
hammer, about 15 cm long, and incredibly useful for repairing
watches.

In came the construction worker and said: "You should try my
sledge hammer - it is much better!  I can tear down a whole wall
with it in no time!  You should really use this and you will be 
proud!"

Replied the watch maker: "You are wrong!  My hammer is much better!
It is so handy, I can carry it around with me all the time.  It 
doesn't weigh much, either.  And it is beutiful - you should really
use it for your work - it is the nicest hammer you can get!"

Construction worker: "No, you are wrong! ..."
Watch maker: "No, you are wrong! ..."
etc...