Click Here
Each pair of shots are a comparison between FSX and FS9. The first shot of each pair is from FS9 while the second shot of each pair is from FSX. You will notice obviouse differences such as DVC gauges and taxiways, while you will also notice obviouse similarities such as cloud textures and haze.
Click Here As Well
This second link will take you to a set of FSX shots [no cocmparisons] and how the frame rates would look like and how the quality of the images will be AFTER utilizing the tweek that we have learned so far.
CORRECTION:
The first shot of each pair have addons in them. Some payware while others freeware. The second shot of each pair have only default.