There are several ENORMOUS differences. Look at my profile picture. I've devised a whole vision test
If you see a Penguinite, you're genetically superior to everyone who doesn't. 20/20 vision.
If you see a furry, you're mistaken. you have 18/18-20/20 vision.
If you see a primate, you're half right. You have 15/15-20-20 vision.
If you see a human, you're schizophrenic or you might have 10/10-18/18 vision.
If you see a penguin, you're blind.
Penguinites are amazing, sapient, deadly creatures. They have fingers, and the physiques of humans. Their heads are just wildly different and their skin is covered in feathers.