*Minor differences ignored. Grouped by changes, with first version listed as example.
The five and thirtieth year of the reign of Asa - This cannot be reconciled with the chronqlogy of Kings 1-Kings 16:8 : and the suggestion in the marg. implies the adoption of a mode of marking time unknown either to himself or any other Scriptural writer. It is supposed that the figures here and in 2-Chronicles 16:1 are corrupt, and that in both verses "twentieth" should replace "thirtieth." The attack of Baasha would then have been made in the last year of Asa's reign; and ten years of peace would have followed Asa's victory over Zerah.
The five and thirtieth year of the reign of Asa - Archbishop Usher thinks that this should be counted from the separation of the kingdom, and that this fell on the fifteenth year of Asa's reign. To settle in every respect these chronologies is a most difficult undertaking; and the difficulty does not belong to the sacred books alone, all other chronological tables of all the nations in the world, are in the same predicament. With those of our own history I have often been puzzled, even while I had access to all the archives of the nation. Probably we should read here the five and twentieth year. See the note on 1-Kings 15:16.
And there was no more war unto the thirty fifth year of the reign of Asa. That is, from the Ethiopian war to that time; after that there was no war with any foreign enemy; there were animosities and discords, bickerings and hostilities of some sort continually between Asa and Baasha king of Israel, as long as he lived, see 1-Kings 15:16.
2-Chronicles 15:19 is different from 1-Kings 15:16. In the latter passage it is said: war was between Asa and Baasha the king of Israel כּל־ימיהם, i.e., so long as both reigned contemporaneously; while in the Chronicle it is said: war was not until the thirty-fifth year of Asa's reign. This discrepancy is partly got rid of by taking מלחמה in the book of Kings to denote the latent hostility or inimical attitude of the two kingdoms towards each other, and in the Chronicle to denote a war openly declared. The date, until the thirty-fifth year, causes a greater difficulty; but this has been explained in 2-Chronicles 16:1 by the supposition that in the thirty-sixth year of Asa's reign war broke out between Asa and Baasha, when the meaning of our 16th verse would be: It did not come to war with Baasha until the thirty-sixth year of Asa's rule. For further remarks on this, see on 2-Chronicles 16:1.
*More commentary available at chapter level.