The 4800mah one is strange one. Some people measure 3700-3800mah, while others measure 4800-5000mah. You can read about it starting here.
BTW, you may not want to drive the C8F to the maximum simply because it builds heat quicker and gives you less turbo runtime. I think you’d be okay using a high capacity battery so as to limit turbo output. If you really want to max it out, try a high drain.
The cells under the wrapper are local chinese brands and usually kept secret.
Probably the highest quality, highest performing cells are the ones from LG, Panasonic/Sanyo, Sony/Murata, Samsung and Molicel.