User blog comment:LivesByProxy/Let's Talk About Urgot/@comment-5035765-20160514230318/@comment-12049719-20160515065022

I agree with what you said.

Sion was resurrected via magic. Because of this, he looks the way he is (glowing, red eyes/soul furnace/ dagger stuck on his head) and his kit has some magic in it too (E and R)

Urgot on the other hand was a product of science. He was resurrected in a similar fashion to the Frankenstein's monster; hence his appearance and kit.