*Minor differences ignored. Grouped by changes, with first version listed as example.
Nine - There are thirteen if we count the four sons of Bath-sheba, and nine without them; and in the second book of Samuel there are eleven, reckoning the above four, and without them only seven. In the book of Samuel probably only those who were alive were reckoned, while the author of the Chronicles comprises those also who were dead in this enumeration. Jarchi supposes that the duplicate Elishama and Eliphelet are those which increase the regular number seven to nine; and that the dead without posterity, as well as the living, are mentioned to increase the number of David's descendants; for, says he, the whole book is written for the honor of David and his seed.
nine--The number of David's sons born after his removal to Jerusalem, was eleven (2-Samuel 5:14), but only nine are mentioned here: two of them being omitted, either in consequence of their early deaths or because they left no issue.
Nine - There are but seven mentioned, 2-Samuel 5:14. Two of them are omitted there, because they died very early, and here we have all the sons of David, which clause is not added 2-Samuel 5:13-16.
*More commentary available at chapter level.