It depends, but typically not exactly.  Creating an “exact” match means duplicating all the same ingredients at the same addition rates in a fragrance.  Fragrance recipes are complicated typically containing many ingredients, some at minute levels (<0.1%).  Our fragrance duplications are often 90-95% “exact” and work very well when compared in the finished product.  Note: it is important to always test fragrances matches side-by-side in the finished product, and not as supplied.  When required, analytical evaluation of ingredients can be done.