"Few realize the significance of those words of Luke, that when Paul saw his brethren, “he thanked God, and took courage.” In the midst of the weeping, sympathizing company of believers, who were not ashamed of his bonds, the apostle praised God aloud. The cloud of sadness that had rested upon his spirit was swept away. His Christian life had been a succession of trials, sufferings, and disappointments, but in that hour he felt abundantly repaid. With firmer step and joyful heart he continued on his way. He would not complain of the past, nor fear for the future. Bonds and afflictions awaited him, he knew; but he knew also that it had been his to deliver souls from a bondage infinitely more terrible, and he rejoiced in his sufferings for Christ's sake. AA 449.1"
"Nevertheless God, that comforteth those that are cast down, comforted us by the coming of Titus;"
Both passages deal with comfort and encouragement in the face of adversity. Paul is comforted by the brethren in Acts, and Paul comforts others in 2 Corinthians. The EGW passage directly references Luke's account of Paul thanking God and taking courage, which is a direct parallel to the comfort Titus brought to Paul.
"At Rome the centurion Julius delivered up his prisoners to the captain of the emperor's guard. The good account which he gave of Paul, together with the letter from Festus, caused the apostle to be favorably regarded by the chief captain, and, instead of being thrown into prison, he was permitted to live in his own hired house. Although still constantly chained to a soldier, he was at liberty to receive his friends and to labor for the advancement of the cause of Christ. AA 449.2"
"And when we came to Rome, the centurion delivered the prisoners to the captain of the guard: but Paul was suffered to dwell by himself with a soldier that kept him."
The EGW passage directly recounts the events described in Acts 28:16, including the centurion delivering Paul to the captain of the guard and Paul being allowed to live in his own hired house. This is a clear and direct allusion.