The definition may differ, so I am talking into account Wikipedia.
https://en.wikipedia.org/wiki/Software-defined_networking
https://en.wikipedia.org/wiki/Network_function_virtualization
vCMP is the technology, so the equivalent to a VE is the vCMP guest.
For a high level, VE or vCMP guest is the same thing.
Both are virtual F5s, but vCMP guest runs on top of a BIG-IP Software + F5 hardware, while VE runs on top of something else (like VMware ESXi + hardware).
I guess both classify as NFV.
I would say that BIG-IQ that classifies as SDN.