1) Vanunu, exposed israel as a liar to the whole world and never got a buck for it (i'm sure you'd think he is a hero if he was in another country opposed to israel's policies), while Pollard spied on his country for a foreign entity for money, so one is a humanist and the other is a traitor. 2) Vanunu served his sentences according to the rules in israel, after that they wanted to make him pay more than what he was sentenced for by denying him elementary freedom to travel and to talk to whomever he chooses. Pollard on the otherhand is serving a life sentence as sentenced and he is still serving it, so his rights are not violated he was judged according to the rule of the land in which he commited his crime and he knew the consequences, so he shouldn't be freed until he serves a live sentence, if he resurrects into a rat he will be a free rat in the next life.
India floods derail two trains, killing at least 20; hundreds rescued (Reuters)
from the article: Vanunu to return to prison for violating the terms of his parole