Another glaring difference is Libby's immediate decision to resign upon his indictment. This is what scandal-poisoned government officials are supposed to do, rather than drag the country through their own personal dramas. As president, Clinton couldn't be indicted, so he never needed a pardon. He was able to settle his case before leaving office exposed him to criminal prosecution.
Libby has no such leverage over the system, and even so, few serious-minded people in the country seem to think he shouldn't be pardoned. The jurors in the case, even the ones who dislike President Bush and wanted higher-ranking officials brought to justice, have gone on record supporting the pardon idea. Libby is a victim of an out-of-control prosecutor -- something I know a little bit about -- and a politically hostile judicial system. It is almost impossible for a high-ranking conservative to get a fair trial in Washington, D.C. The media was howling for Libby's head for months, while leaving unfettered every hair on the head of Richard Armitage, the State Department official who actually outed Valerie Plame. Luckily for Armitage, he was against the war, a get-out-of-jail-free card for anyone associated with this idiotic scandal.
In fact, comparing the Scooter Libby and Bill Clinton perjury cases is like comparing apples and oranges, except the oranges are all rotten and sleazy and hire private investigators to dig up dirt on the women who credibly accuse them of unwanted sexual advances, harassment and assault, as well as order government officials to lie to the American people and slander anyone who calls the oranges out on the lying.
Of course Scooter Libby should be pardoned. He did nothing to deserve the shabby treatment he has received by the media and the criminal justice system. His true crime was supporting President Bush and his leadership in the war on terror. Pardoning Scooter Libby is the right thing to do, no matter what your definition of "is" is.