This is the first time that I have seen a video of corey's leg break, and it's tough to watch, really tough. I think his looks a bit worse than DeAndre's due to the fact that Corey's leg is fully visible while DeAndre's leg is covered by his uniform. I hope that both of these gentlemen recover as quickly and painlessly as possible.
BTW there is another fighter who broke his leg in the exact same way. It was an MMA match, he swung the leg kick and drew back rubber which he tried to stand on but then fell. I will see if I can locate this video as it is a bit old now.
EDIT: video link to similar leg break from Cage Rage.
EDIT EDIT: Here is the first leg break of this sort that I saw about a year ago.