I don't know anything about the Frozen line of cards as I water cool all my cards. This leads me to purchase only reference models as no one ever produces water blocks for non-reference cards.
I like the aftermarket coolers and the use of Military Class II Components on the FROZR product line. I've used numerous MSI products over the years and have never been disappointed!
I like the two cooling fans. Video cards are too large and complex for easy or efficient cooling from a single fan pushing the airflow, just as no enthusiast would want a single case fan.
the twin frozr cooling system from MSI's the best air cooling i've seen from all the reviews, the new 560 Hawk and the 580 Lightning are just awesome with temperatures