Well. Those prices are listed in sgd. and my main question was on the different cooling solutions employed by msi. Sorry that I did but make that clear in the op.
if you want to compare the coolers, you should have listed the same video card model.
Eniwey, the twin frozr 3/Power Edition has better voltage tweaking. Meaning that in overclocking, it will be more stable than the twin frozr 2. With regards to keeping the card cool, i think they are the same.