It is verry simple. In any cases you need to slow down or brake and you do that in a way that you do not slow down more than necessary (which makes it necessary to re-accelerate again in order to have desired speed), all three recuperation modes are exactly on the same efficiency level.
The...
Coasting is very efficient. In any casee you need to slow down and you do so in three different recu modes without braking to much so that you would need to accelerate again (which can happen on strong drive pedal regen cars which call themselves "one pedal driving"), all three recuperation...