Brief one-shot Sony Alpha 900 comparison of LR2.5 to LR3Beta
I compared one low-ISO landscape photo done with a Sony Alpha 900, processing the raw file with LR2.5 defaults and the same with LR3Beta defaults. I saw an improvement in noise handling with LR3Beta. Detail was pretty much the same, although 2.5 gave the impression of possibly being very slightly sharper, but if there is a real difference it wouldn't be practically meaningful for me.
Unfortunately, for my eyes, the color looked the same, and there are no camera presets for the Sony Alpha 900 in either 2.5 or 3Beta. So, for the color rendering purpose, I'll still be using Raw Therapee awhile longer (for the Sony Alpha 900 photos), as I prefer how colors are rendered. In the past I have unsuccessfully tried, for hours on one shot, to use LR 2.5 to get the look that Raw Therapee produces. Perhaps I'm not expert enough with LR yet.