The difference between SRV10/SRV11 and SRV12 is that the antialiasing is far better for V12.
Here is a comparison with SRV10 and SRV11,
SRV10 vs SRV12:
http://screenshotcomparison.com/comparison/131509
SRV11 vs SRV12:
http://screenshotcomparison.com/comparison/131510
The dehaloing was discussed a number of posts ago. The conclusion was that it destroyed too much detail.