The angel from heaven came to John in majesty, his countenance beaming with the excellent glory of God. He revealed to John scenes of deep and thrilling interest in the history of the church of God and brought before him the perilous conflicts which Christ's followers were to endure. John saw them passing through fiery trials, made white and tried, and, finally, victorious overcomers, gloriously saved in the kingdom of God. The countenance of the angel grew radiant with joy and was exceeding glorious, as he showed John the final triumph of the church of God. As the apostle beheld the final deliverance of the church, he was carried away with the glory of the scene and with deep reverence and awe fell at the feet of the angel to worship him. The heavenly messenger instantly raised him up and gently reproved him, saying, “See thou do it not: I am thy fellow servant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.” Th…
"The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John:"
The EGW passage directly references and expands upon the events described in Revelation 1:1, specifically the angel revealing things to John. It also alludes to the prohibition of angel worship found later in Revelation.
"After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;"
Both passages describe a vision of a multitude of saved people. While the EGW passage is more general about the 'final triumph of the church,' the Revelation verse provides a specific image of the saved. The connection is thematic, focusing on the ultimate salvation of believers.