I'm been Messianic for about a year now (mind you I am still very much Pentecostal) and because I worship on Shabbat (Saturday, Sabbath) I've been asked if I were 7th day Adventist (SDA). When I reply no, many want to know the difference since we have some similarities. I'll share just three similarities and three differences;

Similarities: (1) Keeping of the 7th day as separate, holy, sanctified, with worship on the Shabbat
(2) Eating of biblically approved meats and preparation of meats
(3) The Torah (law...wrong translation, should have been translated instruction) is still relevant to the Christian.

Differences: (1) SDAs do not keep the feasts of the Lord, we do.
(2) SDAs do not worship the Hebrew way...blowing the shofar, having a woman light the Shabbat candle, singing the S'hema, etc., we do.
(3) SDAs do not promote the study of the Hebrew language or some aspects of the culture, we do. In fact, this was the catch for me becoming Messianic, I wanted to learn the Hebrew language so I could properly understand Elohim's word.

Every Christian is an advent (an advent is someone who believes in the return of Jesus Christ) but not every Christian understands the role of the Torah, and I'm thankful to Messianic Christians for the education I've received. So no, I am not SDA, I am however, a Pentecostal, Evangelical Messianic Christian (all these turanchi, na wa).