The oil diffusers are great to use while warming up your box, and burning essential oils is especially handy after vaping product. In addition, if you have concerns about nosy, judgmental individuals ever questioning what the box is used for, the aromatherapy explanation is handy in a pinch. In my experience, the glass diffuser is more fragile than the ceramic diffuser, and it tends to get knocked over easier because it doesn't weigh as much as the ceramic version. However, the clear glass looks prettier with the light of the box shining through it. Also, I don't like the writing on the ceramic diffuser. So in the end, aesthetics wins out for me -- I prefer this glass diffuser.