alt Hacker NewsThis is probably the most ridiculous comment I've read in the history of this website.
There is no difference in the amount of energy 1 degree Celsius delta and 1 degree Kelvin delta represents.
The only (and I really mean only) difference is how zero energy is defined. It is not possible to have negative energy, and that zero Celsius represents the freezing point of water is an artifact of convenience, not of absolute definition.
Also, the way Kelvin is defined necessitates that both degrees are identical. If 10 degrees Celcius defined the boiling point of water at 1 atmosphere (or whatever the actual definition is) then Kelvin would be smaller by a factor of 10. And this applies to both negative and positive K values.