Both MOR and injections are changing the shape of the character. You usually can tell the difference because INJ pose usually come with a REM pose of the same name, whereas MOR poses tend to be more distributed with a "zero morph" pose. The INJ uses a reference to delta informations that MUST be set in Poser5 runtime for them to work. MOR poses only use the deltas already present in the character, so they can be stored in an external runtime if you wish. I hope I haven't been to confusing... Best wishes