Re: Replacement case fans
Comparison here:
http://www.corsair.com/en/case-fans
Seems the cases have AF140L fans, which I assume is the LED model?
Re: Replacement case fans
The front fans are indeed LED, and I'm assuming that the rear fan must therefore be a standard AF140 fan, as its non-LED (according to TTL at least)
Re: Replacement case fans
It ought to be, yes.
Corsair do include 'unbranded' versions of these fans, but still call them AF140s in the product spec, so I'd expect them to perform identically.