I have had many cats and dogs.
I have noticed that when I can share some food with my furry friends, my dogs will gobble it up without worrying about the temperature, but my cats will sit there and stare at the food for several minutes until the temperature goes down a bit.
I have taken into consideration that normal body temperature for cats and dogs is more or less the same at 102 degrees Fahrenheit (39 degrees Celsius), but cats have more sensitivity to IR.
Is it just because dogs are more piggy? Or are the mouths of cats more sensitive to heat?