От чего может различаться скорость одинаковых SSD?

# fdisk -l
Disk /dev/sdb: 111.81 GiB, 120034123776 bytes, 234441648 sectors
Disk model: KINGSTON SA400S3
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd139cfcf

Device     Boot Start       End   Sectors   Size Id Type
/dev/sdb1  *     2048 234441647 234439600 111.8G 83 Linux


Disk /dev/sdc: 111.81 GiB, 120034123776 bytes, 234441648 sectors
Disk model: KINGSTON SA400S3
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf1bd474b

Device     Boot Start       End   Sectors   Size Id Type
/dev/sdc1  *     2048 234441647 234439600 111.8G 83 Linux

# time mke2fs -t ext4 /dev/sdb1
mke2fs 1.45.6 (20-Mar-2020)
/dev/sdb1 contains a ext4 file system
	created on Wed Jun  3 15:09:09 2020
Proceed anyway? (y,N) y
Discarding device blocks: done                            
Creating filesystem with 29304950 4k blocks and 7331840 inodes
Filesystem UUID: 062c2b75-634c-4003-8fa9-a5bce4ce8f67
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done   


real	0m12.232s
user	0m0.002s
sys	0m0.016s

# time mke2fs -t ext4 /dev/sdc1
mke2fs 1.45.6 (20-Mar-2020)
/dev/sdc1 contains a ext4 file system
	created on Wed Jun  3 15:09:05 2020
Proceed anyway? (y,N) y
Discarding device blocks: done                            
Creating filesystem with 29304950 4k blocks and 7331840 inodes
Filesystem UUID: 30e38fb4-02e3-4ffa-ba62-d45a74f88c2f
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done   


real	0m2.996s
user	0m0.001s
sys	0m0.012s