"Works wonders" Are you looking for clarity, sharpness or filling?
Many waxes "look" different. The "wettest" may on last a few days.
Car show "concours waxes" tend to have less longevity and durability.
Some waxes are bright and shiny. This is not desirable on black paint.
For black, the main objective is usually warmth, depth, gloss and glow.
Here is an article written by my favorite waxaholic Dr. Oldz daily Nuba.
He rates waxes on: ease of use, cost, properties, looks and durability.