So, what exactly is new here? I will quote the press release:
The fin structure has been modified and allows an optimal water flow while increasing the cooling surface. The modified jet plate with improved inflow engine ensures the best possible distribution of water on the cooling fins. The fully chrome-plated copper base is resistant to acids, scratches and damage. In addition, the chrome plating provides homogeneity and shine that cannot be achieved by nickel plating.
The Eisblock cooler has not only been improved technically: the Aurora design has become visually quieter and simpler, because only one O-ring runs around the entire cooler. In addition, the design around the cooling fins and jetplate provides a cleaner look. The illumination from the digitally addressable RGB LEDs is even better distributed throughout the cooler as a result of the chrome plating.
As to pricing/availability, Alphacool has already put these new GPU blocks up for preorder at their online shop, with a price of €159.98 (roughly $172 USD) each.