Different sites may be testing under different conditions.
Like room temperatures and so on, you don't expect the same cooling you'll get running in Malaysia and then compare to the US in winter time.

That just won't work.

Different way of setting up the system is also another part of the review.
The main point is, collect the all the reviews from 212+ and Megashadow and see of yourself most of the time which cooler comes out first.... and Megashadow it is.