Difference Between The "Instrument Automation" & "Instrument MIDI Control" META Devices?

I’ve noticed there are two devices I can use for controlling instruments. The manual doesn’t make it clear when I should be using which device.

What is the difference between the two devices?
Is there a performance benefit from using one or the other?

Thanks in advance! :slight_smile:

EDIT: I use both a synthesizer and a Kontakt library, if that helps.