Initial body temp is the same is it not? so I wonder if the starting point is the same then decomposition could be the same, straying off topic I fear.
Not really it would depend on the cause of death. When animals are about to die (human animals would be the same) their body temperature would decline.
If two people were shot point blank (no cooling prior to death), the smaller would cool faster than the heavier (as the surface area to mass ratio would be higher).
For those who think Madeleine died in the apartment, they would need to consider the following questions.
But what did Madeleine die from and how rapidly did it happen? Did she die in her sleep? It is hard to say how much cooling occurred prior to death.
Did she fall and die instantly? Did she get picked up immediately or was she left on the cold floor?
Being left in her bed for hours doesn't seem like an option as there was no cadaver odour found on her bed clothes.