I own both Layton and Détour Noir. The two fragrances are really extremely similar.
As for the fragrance notes: The apple in Détour Noir comes across as somewhat more synthetic and harsher. In the drydown, it is less sweet and instead fresher. On my skin, Détour Noir lasts a little longer.
In a direct comparison, Layton remains my favorite by a small margin. For the price, however, Détour Noir is an excellent clone. In the air, its projection is barely distinguishable from the original.