There are many differences between Catholics and Seventh-day Adventists, as there are between Catholics and most Protestants.
Some of the differences between them are:
Catholics have a priesthood while Adventists support the priesthood of all believers.
Adventists do not recognize the Pope, the President of the Adventist church has no doctrinal authority.
Adventists worship on Saturday and Catholics worship on Sunday.
Catholics believe that Mary was born perfect (without original sin), remained a virgin her whole life, was taken into heaven at the end, and serves as coredemptrix with Christ. Adventists believe that Mary was a simple, imperfect girl; that she was a virgin until after Christ's birth; that she died, was buried, and is still in the grave; and that Jesus is the only Redeemer. Adventists believe that people rest in the grave when they die (soul sleep) until the Second Coming of Jesus, with very few exceptions (e.g. Enoch, Elijah, etc.).
Catholics accept the adoration of images and saints; Adventists do not.
Adventists practice Communion (similar to the Eucharist) and believe in consubstantiation (the bread and Grape Juice [not wine] represent the body and blood of Christ); Catholics practice the Eucharist and believe in transubstantiation (that the bread and wine become the actual body and blood of Christ).
Another answer:
Adventist are perhaps more similar to Catholics that most Protestants, Adventists recognize an extra-Biblical source and some Adventists deny righteousness by faith alone.
Seventh-day Adventists and Catholics have different beliefs and practices. Seventh-day Adventists worship on Saturdays, believe in the imminent return of Jesus, and emphasize health and wellness. Catholics worship on Sundays, venerate saints and Mary, and have sacraments like confession and communion.
Seventh-day Adventists and Catholics have different beliefs and practices. Seventh-day Adventists worship on Saturdays, follow dietary restrictions, and emphasize the imminent return of Jesus. Catholics worship on Sundays, venerate saints, and believe in the authority of the Pope. Both groups share some beliefs, such as in the Trinity and the importance of Jesus' sacrifice.
No, the Gideon's do not allow Catholics to be members. Seventh Day Adventists are also denied membership.
Seventh-day Adventists go to church on Saturdays.
Seventh-day Adventists worship on Saturdays, which they observe as the Sabbath day.
Texas Conference of Seventh-day Adventists was created in 1878.
Yes, Seventh-day Adventists do believe in blood transfusions. You may be confusing Seventh-day Adventists with Jehovah's Witnesses, who are an entirely separate denomination.
Thomas Holland has written: 'Seventh-day Adventists' -- subject(s): Seventh-Day Adventists
Southwestern Union Conference of Seventh-day Adventists was created in 1902.
The Sabbath for Seventh-day Adventists starts at sunset on Friday and ends at sunset on Saturday.
Adventists do not celebrate the Great Disappointment.
The main beliefs of Seventh-day Adventists are the seventh-day Sabbath and the second advent, or second coming of Christ. There are 28 fundamental beliefs in the Seventh-day Adventist denomination.