cold air intake in general provide larger HP/TQ gains over a short ram intake. The cold air is a longer set of pipes, which reaches into a spot in a fender well, or some area where it can try to capture colder, more dense air. Short ram will be taking in air directly in the engine bay, which will have higher temperatures. Colder air going in the engine is better. Cold air intake owners have to be careful about sucking up water from storms or whatever. If you drove your car into deep water you have a chance at literally sucking water into your engine. Hydrolocking your engine is frowned upon.