all games are not created equal

This is tricky.  Since both games are from Lionhead Studios, there are many similarities between them.

In Fable 2, you control one man and your actions affect people's opinion of you.  Kill a villager and people will begin to be scared of you.  Play the lute for a group of people and they will love you. 

It's very much the same in Black and White.  You are a god and control a creature.  You can do good things like give wood to villages or bad things like sacrifice villagers for power.  All of these things will affect the villagers belief in you.

In the end, Fable 2 took the formula they began to set up in Black and White and the first Fable and expanded upon it.  Both games do have their flaws, like doing tedious things in order to change people's opinions of you.  However, Fable 2 was always enjoyable.  If one thing got boring, you could always find something else to do in the game to keep you going.  In Black and White, when you got bored, there weren't other things to do, so you were just stuck with grinding it out.