Smoke out. Limited-edition dynamic duos of modern, unique, unexpected color combinations layer on endless effects.
Debauched is clearly superior to Montparnasse in quality. The shades in Debauched apply and blend smoothly and with good pigmentation. The purple shade in Montparnasse does not blend smoothly through the crease, even when applied over translucent powder. It is also not strong in pigmentation. Also, the pairing of shades in Montparnasse is odd.
Even considering the good quality of the shades in Debauched, I think $36 is expensive for what you get.