Maybe they all start out with four human like toes and exposure to fel morphs their feet into hard hooves. The two toe variant is just a step in between the four toes and hooves.
Remember that the legion makes modifications to their demons. that pretty much explains all the variations. Engineers are fat and big to work long hours and have control over the machinery.
Felguards and muscular and have hooves to move better on the battlefield. After all, Eredar have hooves so they must certainly consider them superior.
I used date a girl whose sister was in the Boston Ballet, she was gorgeous, but her feet were the most disgusting things I have ever seen attached to a human being. They could have been irl demon feet, just saying
But yeah she was fit, could lift me (200lbs) up without issue and she was not a big girl at all, legs like a soccer player though!
Yeaaaaaah not a fan of what they end up doing to their feet. But they’re still super athletic.
Like dude I know I’ve been linking videos of Cats lately but lemme show you something cool
The character of Mr Mistoffelees is one of the most demanding roles for this kinda stuff. LOOK AT ALL THE SPINS AND COOL JUMPS. And he makes it look so easy. Especially near the end where he’s around 2:30