Lutheranism has two different sects of the denomination. LCMS (Lutheran Church Missouri Synod) and ECLA (more liberal, allow gay pastors, more freedom the people say).
LCMS (which I formerly was a member of) is the more strict, Conservative form of Lutheranism. In the 1500s Martin Luther got angry @ the Catholic church for making people pay for Indulgences, or forgiveness of their sins. He broke ties with them and got alto of heat for it. Unintentionally, he created his own denomination. Lutheranism. Its pretty much Catholicism w/o the worship of The saints, Mary, and other things that Catholics use as idolatry, instead of worshiping Jesus as their Lord and Savior. Lutherans use actual wine and communion "wafers" for communion.
Methodists use grape juice and real bread for communion. They are less Catholic than Lutherans but are very similar. As far as the most similar to Catholicism Lutheran is next and then Methodist.