I have both, and the best I can say is it is like a game of "Follow the Leader". It's like in High School when everyone would look to the popular kids in order to decide what to wear. Penguins and Emperors were once the rage and now AC's are the cool brand, though nothing has really changed in either filter.troubleshootn;3894791; said:Can somebody give me the lowdown on why these filters are so highly praised??