Chasidut על בראשית 24:40

Noah walked with God (Gen. 6:9) Rashi explained: “But regarding Abraham it says, [Walk before me (Gen. 17:1)], Before whom I have walked (Gen. 24:40); Noah needed assistance to support him, but Abraham strengthened himself with his righteousness and walked independently.” But this is difficult to understand as well, for does the verse not say [Noah was a] completely righteous [man] (Gen. 6:9)? And if [Rashi’s comment is correct,] then he is not “complete” since he lacks the level of Abraham!