Here are the differences between how Jewish folk and SDA / Christian Sabbath Keeper folk worship on Sabbath. Also notice the use of ritual, worship differ as well.
Jewish Sabbath worship and ritual
Shabbat
http://www.jewishvirtuallibrary.org/jsource/Judaism/shabbat.html
Shabbat Evening Home Ritual
http://www.jewishvirtuallibrary.org/jsource/Judaism/Shabbat2.html
Special Sabbaths
By Ariel Scheib
http://www.jewishvirtuallibrary.org/jsource/Judaism/specialshabbat.html
About Sabbath-keepers
http://www.sabbath-day.com/site.html
How is the Sabbath Properly Kept?
http://www.sabbath-day.com/site.html
SDA Worship service from Wiki
The major weekly church worship service occurs on Saturday, typically commencing with Sabbath School which is a structured time of small-group study at church. Most Adventists make use of an officially produced “Sabbath School Lesson”, which deals with a particular biblical text or doctrine every quarter. Special meetings are provided for children and youth in different age groups during this time (analogous to Sunday school in other churches).
After a brief break, the community joins together again for a church service that follows a typical evangelical format, with a sermon as a central feature. Corporate singing, Scripture readings, prayers and an offering, including tithing (or money collection), are other standard features.
[edit] Music style
According to one book, “Adventist worship is generally restrained and carefully organized”.[2] Yet a church document also states the instruments and forms of worship music vary greatly throughout the worldwide church.[3] Gordon Bietz says “Around the world Adventists demonstrate many varieties of worship. Some express a great deal of enthusiastic emotion, and others tend to be more formal.”[4] Many youth-focused churches in the Western world have a contemporary Christian music style, whereas other churches enjoy more traditional hymns including those found in the Seventh-day Adventist Hymnal. “Progressive Adventists” are typically open to a variety of styles of worship music in church, not excluding contemporary Christian music.[5]
[edit] Charismatic expression
Main article: Charismatic Adventism
Early Adventist worship was very expressive, resembling the later (20th century) Pentecostal and charismatic movements. An expressive segment of the church reemerged in the 1980s, yet remains a minority.
[edit] Holy Communion
Adventists usually practice communion four times a year. The communion is an open service that is available to members and Christian non-members. It commences with a foot washing ceremony, known as the “Ordinance of Humility”, based on the Gospel account of John 13. The Ordinance of Humility is meant to symbolize Christ’s washing of his disciples’ feet at the Last Supper and remind participants of the need to humbly serve one another. Participants segregate by gender to separate rooms to conduct this ritual, although some congregations allow married couples to perform the ordinance on each other and families are often encouraged to participate together. After its completion, participants return to the main sanctuary for consumption of the Lord’s Supper, which consists of unleavened bread and unfermented grape juice.
http://en.wikipedia.org/wiki/Seventh-day_Adventist_worship
Now here is my opinion.
IF the SDA, COG, and other Christian Sabbath keepers are REALLY serious about keeping the OT Sabbath laws shouldn’t they act more Jewish?
After all they want to be the “new” people of Israel and reject the FOUNDER of the Christian faith Jesus.
Which leads me to this thought. IF they were to follow the Jewish ways of Saturday Sabbath keeping they would be closer to God. Instead they follow the doctrines and teachings of EG White and her co-horts or insert teacher here.
Instead of following the Jewish Sabbath they end up breaking the very commandment that is so important to their doctrine.