Moving up from SLT-A55

Look, what a surprise - another comment from you putting down the A57... With all the complaining you do denigrating high ISO 'pixel peepers' and throwing out 'margins of error' it's rather a double standard to underscore a textbook example of minor variance.

The A55 and A57 have the same 16MP sensor. Visible differences would be attributable to RAW export software, while A57 JPEG at higher ISO is markedly better. This is exactly what you would expect from the second iteration of the same sensor and model series. Slightly improved processing but essentially same RAW.