iPhone 7 32GB storage issue

Hello!

Why my iPhone 7 32GB is able to write storage at only 40 MB/s?

It is a huge step BACK from 6s. Can it be software related?

iPhone 7 128GB and 6s all models have 6-8x faster storage write capability.

What type of storage is in the base (32GB) model?

Why I am punished for not to have the more expensive 128GB model?

Tested with Basemark OS II and Passmark.

Please get a fix.

Thank you.