DMC5 doesn't have better materials than Hellblade. Skin for example is much more nuanced and organic in Hellblade.
Honestly, DMC5 doesn't look all that impressive on the whole, to me anyway. It certainly doesn't look bad, but it's environments are generally quite sparse and its characters significantly less sophisticated than Hellblade's. In order to run at 1080p/60, it sacrifices detail.
From what I've seen from the multiple demo playthroughs, it doesn't seem like we can interact with the environment, much at all. I was hoping for some epic level destruction physics, but it seems like we'll have to wait until next gen for a new DMC that will give us some decent destructible environments. All the current environments in-game seem to stem from progressive boss fights, which is what we've already seen countless times via previous DMC and even bayonetta games.