Yes but how much heat are those hairs actually saving? In real terms I doubt it’s a number that’s meaningful at all. Like if you had 2 clones and one had their hair shaved and one didn’t, I’m not convinced you could even measure the difference without super sensitive tools and even then it would be a fraction of a degree.

I also doubt there’s any situation where, all else being equal, one would survive and one wouldn’t purely on the basis of having those hairs.