the question is, on a low-impedance cooler, will you get those same results?
You present a good point here danimal, but just to play devil's advocate...
First of all, taking your example, we're talking about a 2C difference. Second of all, we're talking about 12 dB...not to be crass, but that's f*ckin quiet. Now, the fact that SPCR reviewers can take two different fans, run tests, and come out with a temp difference of 2C while maintaining the same noise level...we'll that's just plain awesome (if you consider the room temp and relative humidity can easily change slightly on a minute by minute basis).
I guess my point is, one can piss and moan about static pressure and fin design and whatnot, but at the end of the day, these two completely different *quiet* fans, perform about
the same. Sure you may argue that when stacking up all the heatsinks against each other a couple degrees makes a difference, but what do you expect? SPCR to strap more and more fans on to each review? To me, that not only seems like a waste of time, it's just not necessary.
Now if you could show me a 6-10C difference in temperature, I would be more receptive to your argument. However, a 2C difference in a homemade anechoic chamber in Mike's basement doesn't justify raising fan questions. From what I remember, the room doesn't have any sophisticated climate control..
Hopefully I didn't stray too far off the argument at hand with this post...just trying to help justify SPCR's use of their particular control fan.
*edited for grammar