The current Powercore 10000 (I own) is 36Wh (it says on the item), so sounds like I should shift to looking at Wh to compare as the voltage if the Li Poly is higher than the 18650B Li Ion been used.
So it is actually more capacity, about 7% more. Even taking that into account the Powercore II 10000 is still 6% larger per unit of energy, and 8.1% heavier per unit of energy.
Quickcharge input and output I see. I expect those with Quickcharge chargers and devices will have something new to buy!