Contradiction with Matthew 5:11
Contrasts suffering for righteousness' sake with John's suffering for the word of God and testimony of Jesus, which encompasses more than just righteousness.
Matthew 5:11: Blessed are ye, when [men] shall revile you, and persecute [you], and shall say all manner of evil against you falsely, for my sake. [falsely: Gr. lying]
Contradiction with Romans 8:18
Suggests future glory outweighs present sufferings, whereas Revelation 1:9 highlights sharing in tribulation without mentioning future glory.
Romans 8:18: For I reckon that the sufferings of this present time [are] not worthy [to be compared] with the glory which shall be revealed in us.
Contradiction with 1 Thessalonians 5:9
Speaks of being appointed not to wrath, which seems to contradict the notion of shared tribulation.
1 Thessalonians 5:9: For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ,
Contradiction with Hebrews 12:6
Indicates suffering is discipline from the Lord, which differs from the shared suffering due to faith seen in Revelation 1:9.
Hebrews 12:6: For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.
Contradiction with Philippians 1:29
Describes suffering as a privilege for Christ, while Revelation 1:9 places more emphasis on endurance in suffering.
Philippians 1:29: For unto you it is given in the behalf of Christ, not only to believe on him, but also to suffer for his sake;