Also, for reference, this is how aura looked in the mod. 
The Hidden was also able to drag corpses around and pin them to the walls, there were some voice commands to taunt your enemy/enemies. The Hidden also had a wind-up attack that was insta-kill but gibbed the corpses so they could not be used for healing anymore. Same deal with pipe-bombs. Pavlov version doesn't honor the gibbing, so at least you get the benefit of having a meal ready if you nade someone.
Pavlov version is generally much more IRIS sided, in the mod if you were faced with average players you had to fuck up to lose as the Hidden, in the Pavlov version you either are good enough to be a threat to the entire team or it's a race to who gets to kill you first so they become the Hidden themselves. Wireless/disregard for turning probably gives you an edge, it's generally a good idea to escape up, as most people aim at their head level.