A new video confirms previous reports that the 32GB iPhone 7 has 8X slower write speeds than the 128GB and 256GB models.
Unbox Therapy demonstrates a benchmark and real world test of write speeds on a 32GB and 256GB iPhone 7. The benchmark found that the 256GB model was able to write data at 341 MB/s; whereas, the 32GB was only able to write data at 42 MB/s.
Does this really matter? I think it only matters if you can’t decide between the 32GB and 128GB iPhone 7, but really the 32GB won’t have much space anyway compared to the other models.