This short walkthrough from Ableton's Learn Live series covers two utility parameters on the Chorus-Ensemble device: Dry/Wet and Warmth. The demonstration uses a saw lead to show how both controls work in practice.
Dry/Wet blends the processed chorus signal with the original dry signal. That means you can dial in extreme feedback and rate settings and then ease the effect back into the mix rather than committing fully to the processed sound.
The Warmth knob adds a gentle saturation at the end of the signal chain. It's subtle, but it rounds off the processed signal in a way that can make heavily modulated sounds feel less clinical and more alive.