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?.
Dunhill Century Eau de Parfum
Alfred Dunhill Century Eau de Parfum 135ml Spray For Men - NEW. EDP Men's
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Alfred Dunhill Century Eau de Parfum 135ml Spray For Men Damaged Box
Dunhill Century Eau de Parfum 75ml For Men
Dunhill Men Eau de Toilette Spray 100ml Mens Fragrance Warm Woody Scent