Stories are swarming with scarred or otherwise maimed evildoers. Apart from those named here we got Scarface (a bluefox) in the animals of farthing wood, we got General Woundworth in Watership Down, scars or mutaliations seem to be almost a precondition to villains in the Marvel Universe or many science fiction franchises. A scar and a taste for meat are a very superficial similarity for villains. But also in the story plots similarities between brother murdering ursurper to a throne and random maimed sharptooth of undisclosed background and motivations seem either nonexistend (no monarchies in LBT) or speculative only.
Even from outward appearance alone I cannot say I see much of a similarity between these two characters. Entirely different species, different colors, different look of the scars...
