iPhone 6 plus rear camera

Remember that apple does not manufacture almost all of the hardware in their products. They are usually manufactured by other companies and assembled parts together.

I think it's called OEM which can vary from multiple manufacturers for even the same part.

I've never noticed a quality difference affecting how it will perform from different companies / aftermarket unless it's a screen.

I pretty much go by, as long as the part fits and it works like original then it's fine.

can you give me more detail? and possibly pictures