Many components in the FP are simply being bought. And if you by fast components, they will be more expensive than slower ones. They are not necessarily “better” in quality or “more” but simply more expensive because the companies manufacturing them put a lot of effort into research and need to recover their investments. Just think of a PC processor: You can buy one from intel with 2 cores and 2 GHZ or you can buy one with 4 cores and 2,5 GHZ or one with 8 cores and 3,5 GHZ and many many other combinations. It is usually not much more expensive to make a fast processor compared to making a slow one, but they offer different levels to serve a broader customer spectrum. The same applies to the FP2 internals. It is much much faster and has more expensive components, that hopefuly will last longer than the FP1. Fairphone did not make every single tiny component of the phone themselves. That would be impossible.
The FP1 is not a perfect phone, the FP2 also isn’t. It’s just a step closer to it
The FP1 was a first step into making sustainable and fair phones and the FP2 is the next step in that direction. And the FP3 will be another big step and will trump many of the FP2’s achievements. Just because the one is better than the other, it doesn’t mean that the other is crap. So don’t get confused. If you’re happy with your FP1, that is excellent!!!