Not much of a difference in hp on the two maybe a 1 hp difference. Short ram intakes will give you better response because its a shorter distance for air to trave, cold air intake will give you colder denser air but the air will take longer to travel so the response will be a little bit slower. In the end the cold air intake may get you 1 hp more than short ram but intakes only add in 5 hp anyway. (Best option would be to get a short ram intake and put an icebox on it.) Also a tube is a tube wether aem, injen, or ebay they are all about the same, but if you get a ebay intake, buy a k&n filter cause the ebay ones blow.