The Differences Between Goffin's and Ducorps' Cockatoos

The following are generalizations for purposes of discussion.
Usually the Ducorps' is larger.
Usually the pink on the Goffin's is more pronounced while the Ducorps' is a white bird.
The Crest on the Ducorps' is larger and more pronounced.
Usually the Ducorps' is not as athletic, but some seem to be.
The Ducorps' is thought to be more likely to talk well and have a good vocabulary.
The Goffin's is more family-oriented and less likely to become a one-person bird.
The Goffin's does not have the reputation of biting.
The Ducorps' is considered to be more elegant, purely esthetic.
The Ducorps' is called the Quiet Cockatoo.
The Ducorps' cry a lot the first year of life.
Their call is different, the Ducorps' sounds like a tiny sheep, baaaa baaaa baaaaa.
When speaking, like "hello," the Goffin's seems to have more volume.
The Ducorps' has more yellow than the Goffin's.
The Goffin's is the smallest of the commonly available Cockatoos.
The Goffin's are said to like to chew things a lot.

Following is where they seem very alike:

Both have the same playstyles and like the same kinds of toys.
Both need cages larger than their body size would appear to need since they are so athletic.
Both are perpetual motion machines.
Both love cuddles from their humans, although the Ducorps' is thought to favor one person.
Both are athletic.
Both are intelligent measured by their ability to solve problems.
Both are highly friendly to other birds in the flock.