Comparision Between FAST VP and multicore FAST Cache features

Multicore FAST Cache	FAST VP
Allows Flash drives to be used to extend the existing caching capacity of the storage system	Allows a single LUN to leverage the advantages of multiple drive types through the use of storage pools.
Granularity is 64 KB	Granularity is 256 MB.
Data that is accesed frequently is copied from HDD to Flash drives.	Data is moved between different storage tiers based on weighted average of access statistics collected over a  period of time
Used when workload changes are unpredictable and very dynamic and require a quick response time.	Used when workload pattern changes are predictable and relatively low.
Constanlty promotes frequently accessed HDD data to Multicore FAST Cache. There are no relocation cycles	Data movement in scheduled or manually invoked relocation window.
Real-time monitoring decides which data needs to be promoted to Multicore FAST Cache.	Hourly analysis decides which portion of data needs to be moved.

Reference:

EMC White Paper. (2013, Novemeber) EMC VNX FAST VP. Retrieved from. https://www.emc.com/collateral/white-papers/h12102-vnx-fast-vp-wp.pdf