Comparing Deron Williams and Jeremy Lin is similar to comparing oranges and apples.
Deron Williams is talented. He has great handles and can throw down a hard jam in traffic. He has great size and can post up.
On the contrast, Jeremy Lin is more of a pure point guard. He is fun to watch not because of his athletic ability but because of his pure skills.
This includes court vision and simply making others around him better.
Jeremy Lin also adds more value in merchandising sales.