redeemed = born again through the death of Christ.
It's 6 of one, half dozen of the other.
I wish I could remember the rest of the homily, because the distinction he drew wasn't immediately apparent to me either. Unfortunately, like many homilies, it did not stay in my head and so I can't explain the difference as my pastor explained it. But he definitely was defining the Catholic beliefs as different from "born again." I don't believe there is any such thing as a "born again Catholic."