The original MOGA Ace Power was compatible only with the iPhone due to its need to connect to the phone's Lightning port, but it appears the second version will utilize Bluetooth instead, connecting to both the iPhone and the iPad much like the SteelSeries Stratus.
MOGA's first controller was criticized for both its poor build quality and its high price tag, two issues that have plagued all of the iOS 7 controllers released thus far. It is possible that with more time to work on the hardware, MOGA's second controller could have a substantially better build quality.
Aside from Bluetooth connectivity, it's hard to discern much about the new controller based on the teaser image. Like its successor, it has dual analog sticks, a d-pad, and a set of action buttons.
MOGA plans to unveil its new controller at the Game Developer's Conference in San Francisco, which begins on March 17.