"Suddenly breaking away from the train of history that he was following, and turning upon his infuriated judges, he cried: “Ye stiff-necked and uncircumcised in heart and ears, ye do always resist the Holy Ghost: as your fathers did, so do ye. Which of the prophets have not your fathers persecuted? and they have slain them which showed before of the coming of the Just One; of whom ye have been now the betrayers and murderers: who have received the law by the disposition of angels, and have not kept it.” AA 100.2"
"Ye stiffnecked and uncircumcised in heart and ears, ye do always resist the Holy Ghost: as your fathers did, so do ye."
The EGW passage directly quotes Acts 7:51.
"At this, priests and rulers were beside themselves with anger. Acting more like beasts of prey than human beings, they rushed upon Stephen, gnashing their teeth. In the cruel faces about him the prisoner read his fate; but he did not waver. For him the fear of death was gone. For him the enraged priests and the excited mob had no terror. The scene before him faded from his vision. To him the gates of heaven were ajar, and, looking in, he saw the glory of the courts of God, and Christ, as if just risen from His throne, standing ready to sustain His servant. In words of triumph Stephen exclaimed, “Behold, I see the heavens opened, and the Son of man standing on the right hand of God.” AA 100.3"
"But he, being full of the Holy Ghost, looked up stedfastly into heaven, and saw the glory of God, and Jesus standing on the right hand of God,"
The EGW passage directly recounts and expands upon the biblical account of Stephen's vision before his martyrdom, including a direct quote.
"When they heard these things, they were cut to the heart, and they gnashed on him with their teeth."
Both passages describe the reaction of the priests and rulers to Stephen's words, including their anger and gnashing of teeth. The EGW passage elaborates on Stephen's vision, but the initial reaction is directly from the biblical text.