The problem is that you think these translations say virtually the same thing as the KJV and the NKJV:
New English Bible (NEB)
For the divine nature was his from the first; yet he did not think to snatch at equality with God
New American Standard Bible
who, although He existed in the form of God, did not regard equality with God a thing to be grasped,
Orthodox Jewish Bible (OJB)
Who, though existing in the demut of the mode of being of Elohim [His etzem or essential nature], nevertheless Moshiach did not regard being equal with G-d as a thing to be seized,
Young's Literal Translation
who, being in the form of God, thought not robbery to be equal to God,
King James Bible
Who, being in the form of God, thought it not robbery to be equal with God:
New King James Version
who, being in the form of God, did not consider it robbery to be equal with God,