Benchmarks - Copy
Directory Copy From NAS - 64kB reads
Directory Copy To NAS - Predominantly 64kB writes, wide scattering under 16kB
File Copy From NAS - 4GB file copy, 64kB reads
File Copy To NAS - 64kB writes
Even with all of the additional features now included in modern day NAS units, transferring data is still the number one used function.
In RAID 5, we see these two units each take two of the benchmarks and the margins of victory are very close.