Another list from 9to5Mac with the specs of the thinner Retina MacBook Pro:
- MC975LL/A – MBP 15.4/2.3/8GB/256GB FLASH-USA
- MC976LL/A – MBP 15.4/2.6/8GB/512GB FLASH-USA
- MD831LL/A – MBP 15.4/2.7/16GB/768GB FLASH-USA
It is hard to believe but apparently all models would come with an SSD wit up to 768 GB of storage and up to 16 GB of RAM. Unfortunately, there are more and more chances that the SSD will be like in the MacBook Air (RAM form factor) and that the RAM will be soldered to the motherboard.