Question about LR4 vs CS6
ACR under CS6 and LR4 work essentially the same exact way ... other than the fundamental menu/navigation differences between LR4 and CS6.
The ACR sliders all work the same way between LR4 and CS6. I have been using the CS6 trial and own CS5 and LR4. I'm going to switch to the full version of CS6 at some point in the near future just because I don't really like LR (I never have) but ACR in LR4 and CS6 is noticeably better than CS5 so I've been using LR4 to process RAW files into JPEGs and then open the JPEGs in CS5 to edit.
I'm looking forward to just using the full version of CS6 and avoiding LR4 altogether.