If anyone is interested:
New Testament
NIV
Again, according to the Introduction in the 2011 NIV:
The Greek text used in translating the New Testament is an eclectic one, based on the latest editions of the Nestle-Aland/United Bible Societies’ Greek New Testament. The committee has made its choices among the variant readings in accordance with widely accepted principles of New Testament textual criticism. Footnotes call attention to places where uncertainty remains.
The Greek New Testament the authors refer to is a compilation of hundreds of different Greek manuscripts. The editors essentially judged all of the variants available for each verse and made a decision as to which particular variant reading to select. Bruce Metzger has published separately a
Textual Commentary that explains each decision made. The resulting text is sometimes referred to as the "Critical Text".
KJV
Dr. Maurice Robinson claims in the introduction to a modern edition of the 1550 Stephen's Textus Receptus that there are actually several extant Greek texts published around that time frame that are similarly named. He writes:
The Stephens 1550 edition of the so-called “Textus Receptus” (Received Text) reflects a general agreement with other early printed Greek texts also (erroneously) called by that name. These include editions such as that of Erasmus 1516, Beza 1598, and (the only one actually termed “Textus Receptus”) Elzevir 1633. Berry correctly notes that “In the main they are one and the same; and [any] of them may be referred to as the Textus Receptus” (Berry, p.ii).
All these early printed Greek New Testaments closely parallel the text of the English-language Authorized (or King James) Version of 1611, since that version was based closely upon Beza 1598, which differed little from its “Textus Receptus” predecessors. These early Greek “TR” editions generally reflect (but not completely) the “Byzantine Textform,” otherwise called the “Majority” or “Traditional” text, which predominated throughout the period of manual copying of Greek New Testament manuscripts.
Dr. Robinson also explains the key differences between the Critical Text (e.g. NIV) and the Textus Receptus (KJV):
The user should note that the Stephens 1550 TR edition does not agree with modern critical editions such as that published by the United Bible Societies or the various Nestle editions. These editions follow a predominantly “Alexandrian” Greek text, as opposed to the Byzantine Textform which generally underlies all TR editions. Note, however, that 85%+ of the text of ALL Greek New Testament editions is identical.
He also points out that the New King James Version (NKJV), published by Thomas Nelson, footnotes verses where the CT and TR variants diverge.
https://christianity.stackexchange....-create-the-niv-and-kjv-are-the-manuscripts-u