They are the same identical battery. They are all the PLB-55 under the wrapper. Here are the brands they are sold as:

Shockli 5500mah
Keeppower 5500mah and 6000mah
Vapcell 5500mah red and 5900mah purple
Orbtronic 5750mah

I had to recheck the max continuous output (from 4.2v down to 2.8v staying under the max rated temperature) of the PLB-55. I was thinking it was 15A, but it’s actually 20A. It can do 30A for about 8 minutes. It’s considered a high capacity cell and not high drain, but it’s a newer design than all the other 26650 cells on the market. Its newer chemistry gives it pretty impressive specs.

(BTW, the iJoy 4200mah can do 30A continuous)