I agree, there isn't much dfference between the two until you
magnify above the F10's native resolution where the s9000 becomes
superior. I did notice one thing in the iso 1600 images. I believe
the alleged superiority of the F10 at high iso's is due to higher
noise reduction, not some superiority in the sensor. While a little
noiser the s9000 images were much sharper. I believe the lower
noise in the F10 are achieved through softering the image because
the noise is there, just softened.
Well ... this debate does not show signs of ending.
Your second-guessing of all the reviewers notwithstanding, the laws of physics are going to have to apply here too.
The two sensors are almost the same size, but one of them has 50% more pixels ... thus it must be amplified more to accomplish its 1600ISO sensitivity ... thus you will get more noise. Since this sensor is newer than the 6mp in the F10 (by just a bit), I'll grant that you might not require 50% more amplification and therefore it may not have get 50% more noise ...
But instead of arguing hypotheticals ... let's compare them directly with the excellent images from Steve's Digicams ...
The F10 appears to have low in-camera sharpening and fairly low in-camera contrast. I think that's why the images are so good in post processing. The S9000, on the other hand, appears to have higher default sharpening and contrast settings, which I believe can be turned down. But the point is that this accounts for the slight difference in crispness of the images. The 50% increase in pixels can probably account for the slightly higher level of detail.
I think that the S9000 images are more than "a little noisier" than those from the F10 at 1600ISO. Maybe with some Neat Image and other post processing ...
Even after Neat Image, the S9000 retains some noise in the shadows. But it's a pretty good result and will print or display well.
And, of course, they both look pretty nice when shrunk for the screen ...
F10:
S9000:
I'm not sure why there is still a need to contest the superiority of the F10 and F11 sensor at highest ISOs ... but it's pretty hard to deny.
If Fuji does not announce the intent to put the F11 sensor into an S9000 body soon ... I'll probably be grabbing one myself ... because it's still better than any other long zoom out there.