Fight Club is good because it tests your ability to attack when you're already at your limit, then maintain your momentum after that attack, instead of slacking off or recovering.
Revolver is just plain nasty. It simply tests your ability to recover after an all out effort. But its great because you can do it so many different ways - you can work on cadence, or climbing power, or just plain speed....
Both are Brutal, by far two of the hardest Sufferfest videos I have done, I personally like fight club because when done right the last interval pushes you well past your limit.
Revolver almost reaches the point of monotony with 15 *wink* intervals. In my experience once you hit about the 6th to 7th your intensity factor begins to slip. Fight club offers far more variation and the attacks break up more formulaic intervals.
If they re-did Fight club with new video, an updated sound track and cadence suggestions I would buy it all over again.