Oud and incense are both fragrant substances that are commonly used in perfumery, religious and cultural ceremonies, and personal care products. However, there are some key differences between the two.

Oud, also known as agarwood, is a fragrant resinous wood that is obtained from the Aquilaria tree. The wood is prized for its rich, woody, and musky scent, and it is widely used in the production of perfumes, colognes, and other fragrances. Oud is also used in traditional medicine and in some cultures, it is believed to have spiritual and therapeutic properties.

On the other hand, incense is a substance that is composed of various aromatic materials such as resins, herbs, spices, and essential oils, which are combined to create a fragrant smoke when burned. Incense is often used in religious and cultural ceremonies, as well as in meditation and yoga practices, to create a calming and spiritual atmosphere. It is also used in aromatherapy and as a natural air freshener.

So, the main difference between oud and incense is that oud is a fragrant wood, while incense is a mixture of fragrant materials that are burned to produce a fragrant smoke. Additionally, oud is more commonly used in perfumery, while incense is more commonly used in religious and spiritual practices.