I went with Airaid and it was my only install at the time. Noticed much better throttle response and increase in turbo noise. My reason for getting it was because the stock filter kept plugging up when it snowed. Being stuck on the side of the road because of a damn engineering issue really ticked me off.
Which one is better? Won't even get that thread issue started. Will tell you that we took 3 or 4 air intakes to the track and installed them all on one truck and the Air raid got the best 1/4 time increase. It wasn't much, but the extra layered filter and the better 1/4 time told me it was allowing more into the engine. The HP and TQ gains weren't enough to talk about, but the throttle response was enough for me to choose it. Just my $.02.