Final Death

A Term reserved purely for Vampires as a result of how difficult it is to finish them off, Final Death refers to the act of 'completely' destroying a vampire's physical body. Not to be confused with Diablerie, which not only inflicts Final Death on the Vampire's body, but destroys the soul as it harvests the knowledge and power for the Diablerist.

Torpor
When a Vampire suffers enough damage to kill a mortal, or his body begins to canabalise itself from lack of blood, the vampiric vitae left in his body becomes dormant, and he reverts to a highly corpse like state.

This state is not final death.

A vampire in Torpor slowly heals over time if blood remains in the body, otherwise it remains perfectly preserved until fed enough blood to reanimate the vampire, but this is not wise at all, since the corpse suddenly becomes a vampire without even close to enough blood to sustain it, standing near a temptingly available blood source.

The Difference
A Vampire can go into Torpor from Lethal and Bashing Damage, to destroy the vampire (final death) atleast one point of aggravated damage must be dealt to it, generally from sunlight or fire, Although the Fangs of Lupines and Vampires, as well as Claws produced by Protean and several other disciplines can produce such damage.

This implies that a vampire, regardless of how injured, even hacked to pieces and decapitated might hypothetically still be able to be re-animated... atleast with enough of the pieces. Proof of this theory can be taken from the Setites, who in the dark ages practice a ritual to inter their organs and enter an invulnerable torpid state, from which they can be roused only by being fed their own organs again.