HotHardware have a CAS2 PC133 Head-to-Head between Corsair and Mushkin. Check out my review of the Corsair stuff here for comparison.
HardOCP have reviewed the Copper Orb.. and they think it sucks. However they do note that they are not made by ThermalTake.. so they're more a cheapy ripoff than anything else, and it's not surprising they don't work well.