Yes, the main differentiating feature of the Fragrance Mouse is a "refillable vial" in its underside, next to the place where you put the battery and store its 2.4 GHz USB wireless receiver when not in use. The vial stores "aromatic oils" that "can be washed and refilled with different scents." Asus doesn't make any specific recommendations about the scents that you can put in the vial, so you have a lot of latitude as to what, exactly, you can make your mouse smell like.

J'ai déjà vu pas mal de features curieuses dans les souris, mais alors là...