"For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in."
Both passages refer to the inclusion of Gentiles. EGW uses the phrase 'Gentile world' while Romans speaks of the 'fullness of the Gentiles.'
"For hundreds of years the Scriptures had been translated into the Greek language, then widely spoken throughout the Roman Empire. The Jews were scattered everywhere, and their expectation of the Messiah's coming was to some extent shared by the Gentiles. Among those whom the Jews styled heathen were men who had a better understanding of the Scripture prophecies concerning the Messiah than had the teachers in Israel. There were some who hoped for His coming as a deliverer from sin. Philosophers endeavored to study into the mystery of the Hebrew economy. But the bigotry of the Jews hindered the spread of the light. Intent on maintaining the separation between themselves and other nations, they were unwilling to impart the knowledge they still possessed concerning the symbolic service. The true Interpreter must come. The One whom all these types prefigured must explain their significance. DA 33.2"
"That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:"
Both passages discuss Gentiles seeking God or having some understanding of Him. Acts 17:27 speaks of Gentiles seeking the Lord, while EGW describes Gentiles with some understanding of the Messiah.