It turns out that the base model of the new 13-inch MacBook Pro with the M2 chip has significantly lower speeds
Authors of Max Tech and Created Tech YouTube channelstested the 256GB model with the Blackmagic Disk Speed Test app. The team found that the SSD's read and write speeds are around 1450MB/s, which is about 50% slower in reading and about 30% slower in writing, compared to the SSD in the 13-inch MacBook Pro with the M1 chip.
The experts disassembled the laptop and saw that the model256 GB is equipped with only one NAND flash memory chip, while the previous model had two NAND chips of 128 GB each. This difference likely explains the performance.
It is noted that only the base model of the 13-inch MacBook Pro with the M2 chip has a slower SSD.