1 Peter 1:3 “Begotten us again” or “born again”
At the outset, the two are of the same. Precision wise, “Begotten us again” in the KJV is superior translation than the term “born again” as used in the NASB.
The text mainly says of the “God and Father of our Lord Jesus Christ” hence we talked of the relationship. As to the Father to the Son, the KJV uses begat, beget or begotten thus thw whole chapter of Matthew 1 is saying Abraham “begat” Isaac and Isaac “begat” Jacob never to “give birth” “born” which only a mother could do. No father is able to give birth or born a child in his intestine, only a mother to her wombs.
Interestingly, the proper usage of “begotten us again” is related much to “salvation” which verse 5 sheds the meaning of the context that as a result of faith “end of our faith” is “unto the salvation of souls”. So that the term “saved” is related to begotten us again, having an established relationship with the heavenly Father into a lively hope just as the Father has seen his child bringing hope to the family. Additionally, we are “begotten” into a lively hope since the resurrection is our final hope and the final estate of the believers into a glorified body. “Born again” on the other hand speaks of beginning and a new life in Christ.
Once again, when we speak of “saved” “salvation” this concerns the soul and being “born again” concern much of the spirit. While I believe, the Doctrine of Salvation includes election, regeneration, justification, sanctification, justification, glorification etc. These terminologies would differ but still under the umbrella of Salvation.
Precision in translation as per comparison, the KJV is superior than that of the NASB in the particular text.