Why does an Audi fetch more money than a Skoda, when they are based on the same platform, have the same engine, and the Skoda is model for model better equipped?
You could play the same game with Volkswagen, SEAT, all pretty much the same product.
There's a world of difference in the price of batteries, too, and on the face of it they look the same. Dig deeper though, and its clearer. A few years back there was in the UK a big sale make of battery. They looked great. They sold well.
Under the flash shrink wrap and the fancy label though they were wrapped in normal buff colour masking tape, and the soldering was atrocious. You could not trust their capacity nor discharge claims, and they rapidly went high impedance.
Users eventually realised they were being ripped off. Sales fell.
The company changed their name, altered their visual identity, RAISED their prices, and all of a sudden they are the pack to have from Internet verbage/hype.
Pricing has NO relationship to what is being offered or the true value of what you get.
Example, two 1100mAh 4S from the same maker. One is much larger, and surprise surprise has a larger discharge rating. Its not ACTUALLY an 1100 at all, its a lower discharge 1300/1350 with a higher discharge 1100 label. Of COURSE it will offer better discharge, its got greater capacity! (They are the same proportions, dimension and weight)
Now the punch line............... The 1300 "1100" is more money than the 1300, as after all, its a "premium" high discharge product............. Yea, Right!
Buyer beware..........................