I say it doesn't make much of a difference. I have cone filter on the end of my OEM intake hose. It serves as a very functional and inexpensive SRI. I also have a home-made ram-air feed that starts right behind my left fog light plastic panel and ends at my cone filter. (I cut out the back of the plastic panel and attached a section of 4" diameter flexible gutter hose. Obviously I removed the OEM intake tubing and that resonator box.) I now get the quick response of an SRI and cold air rammed onto my filter when the car moves, the best of both worlds so to speak. (By the way, I discovered that the OEM system has no ram effect at all. On my V6, the OEM air intake that begins right in front of the battery is capped to prevent anything from being forced into it.)
Anyway, I was very disappointed with the results of my ram air. I constantly monitor my intake air temperature with my Scan Gauge. It seems Honda placed the temperature sensor aft of the throttle body inside the intake manifold. Consequently it reads the "heated" intake manifold air temperature. It is always about 30*F hotter than the outside air.
When I floor my car and let in a burst of cold air, the Scan Gauge shows a rapid decline in air intake temperature, often around 10*F or more. But it is only for that time the throttle is wide open. Under all other driving circumstances, my air intake temperature is about 30*F higher than the outside air.
Here's the kicker. The temperature is the same now as when I had just a regular "heat soak" SRI, which was also exactly the same as when I had the OEM air box. Unless the engine was floored, the air intake temperature was the same with all three intake systems. My guess is that under normal driving, the throttle valve is opened so little that it does not let a meaningful amount of air (cold or hot) into the engine to make any difference inside the manifold. Even at 80 mph when I know I'm getting a ton of cold air rammed right onto the filter, the intake air temp remains about 30*F higher than the outside air. It really makes me question the value of any CAI.