Turkish oud is used in Turkey and Greece. Its timbre differs from an Arabic oud; its sound is more treble and brighter because of tenser strings and thinner soundboard. In addition, its sustain is longer.
The Arabic oud is used in North Africa, the Arabian Peninsula, Iraq, Syria, and in Levant. This type of oud is the most popular and most selected oud due to its rich sound and deep timbre. It is heavier and bigger comparing to Turkish oud given that the soundboard is thicker. Its sustain is short.
Syrian oud may be considered under the Arabic oud family. This type of oud generates lots of overtones.