That Fusca guy does not look like JFKjr, HOWEVER, it is possible that Fusca is used for plausible deniability. If JFKjr is still alive, he might dress like Fusca. This way one photo may look like him, yet another wouldn't. Just a thought.
Why 3 Fuscas? I agree the one at the rally looks the most similar to JFKjr.