LDS take on the different verbage in Genesis 6 and Moses 8

Moses 8 >25 And it repented Noah, and his heart was pained that the Lord had made man on the earth, and it grieved him at the heart. > >26 And the Lord said: I will destroy man whom I have created, from the face of the earth, both man and beast, and the creeping things, and the fowls of the air; for it repenteth Noah that I have created them, and that I have made them; and he hath called upon me; for they have sought his life. > >27 And thus Noah found grace in the eyes of the Lord; for Noah was a just man, and perfect in his generation; and he walked with God, as did also his three sons, Shem, Ham, and Japheth. > >28 The earth was corrupt before God, and it was filled with violence. > >29 And God looked upon the earth, and, behold, it was corrupt, for all flesh had corrupted its way upon the earth. > >30 And God said unto Noah: The end of all flesh is come before me, for the earth is filled with violence, and behold I will destroy all flesh from off the earth. VERSUS Genesis 6 >And it repented the Lord that he had made man on the earth, and it grieved him at his heart. > >7 And the Lord said, I will destroy man whom I have created from the face of the earth; both man, and beast, and the creeping thing, and the fowls of the air; for it repenteth me that I have made them. > >8 But Noah found grace in the eyes of the Lord. > >9 ¶ These are the generations of Noah: Noah was a just man and perfect in his generations, and Noah walked with God. > >10 And Noah begat three sons, Shem, Ham, and Japheth. > >11 The earth also was corrupt before God, and the earth was filled with violence. > >12 And God looked upon the earth, and, behold, it was corrupt; for all flesh had corrupted his way upon the earth. > >13 And God said unto Noah, The end of all flesh is come before me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth. My question is why was the wordage changed around who was "repented". In moses it makes it seem like because of Noah's sorrow and the dangers against his life God who was already angry at the world flooded the earth because of Noah's faith. Whereas in genesis, It seemed to be Gods decision to flood and the earth and noah was an innocent bystander who God decides to save. But the pearl of great price being a collection of extras a retranslations of the bible maybe the mormons decided genesis was incorrect. Or do these two sections go hand in hand. Let me know your thoughts from an LDS perspective and outside perspective.