They are GP3300's.
As will all the other alternate shrink wrap GP cells (Trinity Zebra Epic, Orion SP and SP2, Yokomo, Powers, GP-USA Tan/Green, Puke Rainbow...etc) its the same cell underneath.
The Orion SP2 is the latest generation of the GP3300 cell and everyone will have their own shrink version within a few weeks.
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series