shock : a sudden upsetting or surprising event or experience (and as a noun) a feeling of disturbed surprise resulting from such an event.
shake: upset the composure of; shock or astonish
So- by the dictionary definition, one might think so. In actual use, to say "I was shocked by the news" carries far more sense of the intensity of the reaction than 'shaken', because 'shaken' has a much broader use, from a sense of 'having your feathers ruffled', being a bit disconcerted (=disturb the composure of; unsettle) to shaking like a leaf because you've nearly been hit by a car and killed. "shock' has the strong sense of 'suddenness' and that this affects one totally, one is then 'shaken up badly' as a result.