lol, yeah its probably the Lightning, but the Twin Frozr II/OC is just as good tbh. And you save £20 and every penny counts
The only real difference between the Lightning/Twin Frozr III and the Twin Frozr II is the non reference PCB on the former (I think, there might be slight cooler tweaks).
Anyway, from what I've seen, the Twin Frozr II and the Twin Frozr II/OC actually run quieter than the Lightning at stock because the Lightning has higher "stock" clocks.
Actually I can't find the non-OC'd Twin Frozr II many places, maybe its been withdrawn.
Twin Frozr II/OC- 800MHz
Lightning- 832MHz
Those are "stock" core clocks out of the box for each card, but the chips easily go to 900MHz, I think nearly all of them will do 900MHz, just the Twin Frozr II will need a little extra voltage than the Lightning to get that. But then you could have a good 580 chip which itself overclocks well, so there isn't much difference at all.
OH edit- the Lightning XE (Xtreme Edition) is probably the best, but bearing in mind what I said, its all a bit superficial. It looks stunning though
LINK
Smart Temp Sensor Technology dynamically changes the color of the fan blades from blue to white to signal high operating temperature conditions.