Which IBM storage solution provides the least latency?

A.
IBM FlashSystem 900
B.
IBM FlashSystem V9000
C.
IBM ESS with SSDs
D.
IBM DS8880 with HPFE
Explanation:
https://www.ibm.com/developerworks/community/blogs/5things/
entry/5_Things_to_know_about_IBM_FlashSystem_V9000?lang=en