Twister6 posted a review of the new Primacy over on Head-Fi. These are a triple driver hybrid IEM comprised of two balanced armatures and one dynamic driver. From the review they sound like a refined version of the original Primacy.
Pros: ergonomics of the design, updated sound tuning, premium 8-conductor cable, accessories.
Cons: included case is not pocket friendly, would like to see the cable with a balanced termination, “new” naming could be confusing.