Judaism is close to 4,000 years old, and is accepted as the pre-curser of Christianity by all Christians.
Mormonism is not quite 180 years old, and is seen as a very odd cult built on ridiculous fabricated evidence, by an oversexed fraud.
BIG DIFFERENCE!
Personally I would be highly suspect of anyone who really believes the tenents of the LDS--and I wouldn't want a President so gullible.
Actually in my belief system, The True church has been on the earth since the time of Adam predating Judaism. The Church of Jesus Christ has been present throughout history. IOW Adam was Christian, Moses, of the mosiac law, that Jews follow was Christian. Judaism really is Christianity, they just don't realize it. Some famous bible theologian (sorry I can't remember the reference) cites thousands of references and hidden meanings about Christ on the OT. The Bible says that when the Messiah returns the Jews will finally recognize him.
Do you claim Christianity is only 2000 years old or eternal, ie from before the earth was created?