Adda fan, arguably the one with the MOST airflow for any 92mm competitor. And yes, this one is even louder. Other than this subtle difference, the two look identical, as you'll no doubt see in the picture below. Like I said, they look the same. For now feast your eyes on another pic from the front.
Features Looks like it's time to get down and dirty.
Just for the fun of it, here are two pics of the fans. Just because I can, here's a picture from the back. Again, take heed of the size difference in fins and motor of each fan, respectively. One more thing I forgot to mention. While these coolers are meant to better circulate the air inside your case, they actually lowered my overall case temperature.