Okay, this is a little bit of a stretch... but...
Human domesticated Dog vs a Wolf. I have an Anatolian Shepherd, which are flock guardian dogs from Turkey. They've been bred for a really long time to defend flocks of goats, sheep, etc from predators such as wolves and bears. An Anatolians instinct is to protect the flock from harm to the point of death. A wolves instinct is to get food and live another day. The result is that an Anatolian will utterly go for the kill, while the wolf will react defensively to the Anatolian. While the Anatolians are bigger and stronger, if the wolf fought with the same mindset as the Anatolian it would have a much better chance of killing it, but because it is more concerned with not suffering serious injury (the wolf is more geared towards self-preservation) it has much less of one.
Now, is that the wolves default OB and DB or is it a form of 'Parry?'