Difference between a large condesing unit and a chiller, and between VRF and VRV

[tony_the _tiger]

Hi all,

New to the industry, hopefully off to do my Level 2 at college shortly.
Was just wondering what the difference between a large condensing unit and a chiller of the same size is?

Also what is the difference between VRF and VRV?

Many Thanks.

Rich.