They are completely different games, though they are set in the same fantasy world. Both use a form of worker placement for action selection, but otherwise there is nothing in common.
Well, the game indeed happens in the same world, so you can find similar game component and background, but the game itself is indeed totally different.
The only thing in common is that one of the core mechanism is worker placement (but far to be the only one and even this one is working way differently).
So it won't be easy to just summary the differences ^^'