It looks to me like it will be "ram air" regardless of the hood, via the grill. I remember the Trans Am had a WS6 package (ram air) that was good for a true 15HP and 10 torque.
Companies like AFE are typically full of crap. I've only had overall performance decreases from aftermarket CAIs. Usually they cause major heat soak, or in the case of the very beautiful AFE, they're no improvement over stock. It's like replacing the stock system with a cooler looking aftermarket system.
This mopar system excites me because it looks like it will net real world performance increases.