Everything. They have absolutely nothing in common.
I don't lobsters!
You don't talk about fight club.
Because they always work problems out with a pencil.
One shoots and shoots but can't hit, and the other...
Absolutely nothing.
A Specialist knows more and more about less and less until he knows absolutely everything about nothing. A Generalist knows less and less about more and more until he knows absolutely nothing about everything.
One shoots but can't hit, the other hoots but can't sh...