There are many different types of lavender plants and of those plants there are many types of lavender essential oil and absolute used in natural perfumery.
Lavandin Arbaralis (Lavandula hybrida) is not often used in perfumery as the smell is medicine like and sort of falls into the same set as tea tree, eucalyptus, camphor. Both absolutes, the Spanish Lavender Seville (Lavandula luisieri) and the Bulgarian Lavender (Lavendula angustifolia) share similar nuances to each another but seem nothing like any one of the essential oils. The absolutes are more woody spicy, with the Bulgarian Lavender having an interesting almond note on the dry out. The French Lavender essential oil develops cool herbal notes which were clean and crisp and the Indian Kashmir Lavender develops a clean but sweet note on the dry out. Arctander says about Lavender essential oil "lavender essential oil blends well with Bergamot, and other citrus oils, clove oils (for "Rondeletia" type perfumes), fluve, liatris, oakmoss, patchouli, rosemary, clary sage, pine needle oils, etc. " He also says in relation to Lavender oil "Labdanum products are excellent fixatives..." Arctander says of Lavender absolute: "Lavender absolute...of very rich, sweet- herbaceous, somewhat floral odor; in dilution it bears a close resmblance to the odor of the flowering lavender shrubs. It's woody-herby undertone and courmarin-like sweetness duplicate the odor of the botanical material far better than the essential oil. The absolute is sweeter but less floral the the essential oil, and the two materials can form a very pleasant combination".