16 and Zadok the son of Ahitub, and Abimelech the son of Abiathar, were priests; and Shavsha was scribe;
*Minor differences ignored. Grouped by changes, with first version listed as example.
Zadok - and Abimelech - priests - Both high priests; one at Gibeon, and the other at Jerusalem, as we have seen 1-Chronicles 16:39.
Shavsha was scribe - Called Seraiah, 2-Samuel 8:17.
*More commentary available at chapter level.