With all due respect, I doubt that the intelligence of either animal is either easy to assess, nor is it easy to compare the intelligence of the two, so I can't really take that as any sort of evidence. And in any case, if intelligence was a factor behind hardness then, as discussed earlier in...
The Honey Badger's weakest point is that it doesn't actually seem to cause much damage to other animals. Sure, it stands up to them and sometimes enough to make them clear off, which is to be commended - but I've yet to see any evidence of it going completely headmental for the massacre of any...