But there is an element of contrast included.
So, here’s Amplify Whites in SFX…
… and here’s a Tone Curve in PL6
Here’s Amplify Blacks in SFX…
… and here’s a Tone Curve in PL6…
Here’s Soft Contrast to the right in SFX…
… and here’s a Tone Curve in PL6…
Here’s Soft Contrast to the left in SFX…
… and here’s a Tone Curve in PL6…
You see, it’s not that difficult to do the same thing, just with different tools.