As far as believing in the Same Jesus as everyone else I have mixed feelings on that. They believe in the Jesus that was born of Mary and all that is said of Him in the Bible, they believe He is God, The Son and that He Has a Father Elohim. Before Nicea there was a lot of discussion on the topic, the Mormon Bishops at the meeting would have been kicked out and banished or worse had they been there then but they would not have been alone.
I don't know exactly what the definition of cult is but I would be reluctant to call them a cult, I would call them a sect.
By definition, a cult is any belief that diminishes the divinity of Christ. Jesus was not an angel. He created the angels. Cults often teach that Jesus was an archangel.
Cults have their own translations of the Bible. The Adventist use their translation “The Clear Word” that includes the teachings of Ellen G. White, with no distinction between her words and scripture.