The differences are the amount or the concentration of oils that are in the scents. The higher the concentration of oils, the longer your scent will last, and the less you should need to apply. Are all of your products genuine?.
Ralph Lauren Romance Eau de Parfum 50ml Spray New & Sealed
Ralph Lauren Romance Eau de Parfum 100ml
Ralph Lauren Romance Eau de Parfum 100ml EDP Spray New & Sealed
Ralph Lauren Romance Silver Eau de Toilette Spray 100ml Fragrance Bottle
Ralph Lauren Romance For Men 100ml Edt Spray