I believe that each is sufficient unto it's purpose but none is interchangeable. None is stronger at being what another needs to be.

A little like the question - is a cat intelligent? A cat is GREAT at being a cat.

Brother, in all Christian love, may I say that this is what the Bible calls "endless genealogies" ie arguments which go nowhere. The story of the origins of the Nephilim is a single narrative in the whole story of God's interaction with humanity.
What it proves is that sin spread to the whole of mankind, and that everyone is affected (cf Romans 3:23)
It is not a story that needs people discussing who is stronger or weaker. Let it be.
What is more important is to spread the gospel of the saving death and resurrection of Christ to all we meet.