What's the difference between the pocket options?
Below are some photos of the Backcountry Pannier and Reckless 80L Revolver that will help explain the pocket options.
Backcountry Pannier
No Aux Pockets (30L/bag capacity):
Two Aux Pockets (35L bag capacity): 1 aux pocket mounted to each pannier
Four Aux Pockets (40L capacity per side): 2 aux pockets mount to each pannier
Reckless 80L (V3.0) Revolver
No Aux Pockets (72L/bag capacity):

Two Aux Pockets (80L bag capacity):