talking about differnce : well combat has one less USB 3.0 port, no e-SATA port, comes with only one 120mm fan but haf advanced comes with 2x 200mm and 1x 120mm fan - the two 2x 200mm fan, one extra usb 3.0 and stat 3.0 ports made the advanced much costlier though the build quality is same for both.
Comparing these three ( features and price ) Corsair Carbide 400R is a much better solution.
Comparing these three ( features and price ) Corsair Carbide 400R is a much better solution.