What's the difference between Ben Bernanke printing 600 billion dollars?

Well printing the money will initially bring down the value of the dollar thus increasing exports because your exports look more attractive on the Global markets. There is a downside in immediate international relations, China, German and Japan are not happy with this as it takes a large chuck from their export markets. The second problem is that it is unsustainable in the long run. To be honest you are between a rock and a hard place and it does appear to be the only option in the short-term.