Sometimes I've been succesful, sometimes not, judging by the wax samples. I believe they all tell you succesfully what genre a fragrance is ( i.e. floral, oriental, chypre ) but do vary from the juice considerably. Mandarine Mandarin, for example, is almost entirely missing its namesake mandarin note in wax form, which rather obscures the fascinating celery and florals accord that I purchased a large decant for.
Sarrasins was my most succesful buy based on wax, but it's a lot thicker, warmer, fruitier, and dirtier in liquid form than the rather chilly, reserved jasmine I smelled in the wax.