there is a thread about how to interpretate selective tone tool there is also a gray ladder.
If you have two screens load this “testfile” in LR and DxO and see when what who is done in both.
No use to use a raw file, it’s differently processed from the start when turning it in a screen preview in both rawdevelopers so even when the shadow sliders are working the same it 's outcome would be different. That’s i think why it’s no use to try compare LR and DxOPL in way of use.
Compare endresult yes.
when i am at home i will give it a go. ( please ad a LR endresult jpg as example how you would process the image to your liking.
thanks.