On paper, volk is far better. Look the level of comp they're facing and look at their credentials. Ilia's best win is a 38 year old man who had arguably lost his 3 previous fights before facing ilia.
What is the on paper aspect of ilia that you are looking at? On paper he's done nothing much unless you consider achieving a BJJ black belt as extremely meaningful. It's his "off paper" skills that he is showing that is more meaningful. Stats and credentials dont win fights, so we'll see how it goes.