Some post-1900 KJV editions were based on the 1873 Cambridge edition of Scrivener instead of on the 1769. There are also the 2005 and 2011 Cambridge editions by David Norton that are not based on the 1769.
The text in the great majority of post-1900 KJV editions is not the 1769 Oxford Blayney revision. Many of them may be based on the 1769, but they are not identical in their English text to the 1769. Over 400 changes or revisions have been made to the 1769 Oxford Blayney revision in typical varying present or post-1900 KJV editions. In 90 to 100 places, most post-1900 KJV editions differ from the 1769 Oxford in LORD/Lord or GOD/God renderings. The "God" in the 1611 edition at 2 Samuel 12:22 was not corrected to "GOD" until the 1829 or 1835 Oxford edition. The 1769 Oxford edition introduced the new error "Zithri" at Exodus 6:21 from the last word of Exodus 6:22, and that new error remained uncorrected in most Oxford and Cambridge editions of the KJV until the 1873 Cambridge. Some other places where the 1769 Oxford would differ from most post-1900 KJV editions include the following Old Testament examples: “Heman” (Gen. 36:22), “thy progenitors” (Gen. 49:26), “Zithri” (Exod. 6:21), “travel’ (Num. 20:14), “brakedst” (Deut. 10:2), “thy tithe” (Deut. 12:17), “thy earth” (Deut. 12:19), “the widow’s” (Deut. 24:17), “Beer-sheba, Sheba” (Josh. 19:2), “children of Gilead” (Jud. 11:7), “all the coast” (Jud. 19:29), “in a straight“ (1 Sam. 13:6), “Shimei“ (1 Chron. 6:30), “whom God alone” (1 Chron. 29:1), “on the pillars” (2 Chron. 4:12), “thy companions’ (Job 41:6), “unto me“ (Ps. 18:47), “my foot” (Ps. 31:8), “feared” (Ps. 60:4), “in the presence” (Ps. 68:2), “part“ (Ps. 78:66), “When there were” (Ps. 105:12), “gates of iron” (Ps. 107:16), “the latter end” (Prov. 19:20), “riches, honour” (Prov. 22:4), “king of Jerusalem” (Eccl. 1:1), “gone to” (Isa. 15:2), “travel‘ (Lam. 3:5), “a brier” (Micah 7:4), and “mighty is spoiled” (Zech. 11:2). In the New Testament, examples include “And in the same” (Luke 7:21), “ye enter not” (Luke 11:52), “lifted“ (Luke 16:23), “and the truth” (John 14:6), “the names” (Acts 1:15), “Now if do” (Rom. 7:20), “not in unbelief” (Rom. 11:23), “the earth” (1 Cor. 4:13), “was done“ (2 Cor. 3:11), “about” (2 Cor. 12:2), “you were inferior” (2 Cor. 12:13), “those who” (Gal. 2:6), “the holy apostles” (Eph. 3:5), “broidered” (1 Tim. 2:9), “sprinkled likewise” (Heb. 9:21), “our joy” (1 John 1:4), and several missing words at Revelation 18:22.