If you scroll down on Gingejbee's link you'll see this line:
"Capacity: 4 Cell-1 41WH 2800MAH; 4 Cell-2 32WH 2200MAH Battery (Optional)"
As I read that, the '4 Cell 1' model is the higher capacity one (rated at 2800 mAh), with the '4 Cell 2' model only rated at 2200 mAh. So, of the two, it's the '4 Cell 1' which you should opt for.
However, given that the battery in my link is rated at 4400 mAh (meaning that it will last longer), and is also cheaper, I can't see why you're not opting for that one anyway.