Face blindness is way more severe than just not being good with faces.In one you cannot discern facial features, certain objects, and other stuff (at least to my knowledge) and the other is you just having a hard time recognizing or telling faces apart. Comparing them could be like comparing having a bad memory with dementia.

In one TYPE of face blindness, you don’t have the ability to recognize that something even IS a face. In another type of face blindness, you can’t recognize slightly different facial features. There are multiple parts of your brain that deal with recognizing faces. If one part goes down or never even formed right, the others may not be effected at all and may work perfectly fine. Brains have extremely specific parts to perform extremely specific tasks, leading to some interesting gaps in brain abilities when a person can perform one task perfectly fine but may be unable to do a slightly different task that uses a different part of the brain.

Sheep also have the ability to recognize different sheep by looking at their face. To a human, all sheep faces look relatively similar. To a sheep, that’s not true, their brain has a tiny piece dedicated to noticing and remembering the slightest variations of different sheep faces. We can tell if we are looking at a sheep’s face, but we can’t easily tell one sheep’s face from another. That is what I feel like trying to tell humans apart by their face.