Those are not the same cells. From what I know, there's only 2 places that makes 30C LiFePO4 RC packs, one starts with a H and the other with a Y, but they use higher capacity cells. The cells MA claims to use are 2250mAh.
Lets see, the 3000 and 3800mah cells are 20c discharge and the rest are 5c discharge. That means there could be different cells maxamps uses or they use the 5c or 20c cells. Maybe there is a 30c flat LiFe cell.
However, this chemistry is better suited in e-bikes and I guess transmitters because they have a long life, they are durable, they charge fast, and the power/weight is pretty good. They don't have the flattest discharge curve however..