Peninsular Arabic
Peninsular Arabic, or Southern Arabic, are the varieties of Arabic spoken throughout the Arabian Peninsula. This includes the countries of Saudi Arabia, Yemen, Oman, United Arab Emirates, Kuwait, Bahrain, Qatar, Southern Iraq and the tribal people of Jordan (the native Jordanians).
Eastern Arabia
The Arab states of the Persian Gulf are solely Eastern Arabia, the borders of the Arabic-speaking Gulf do not extend beyond Eastern Arabia. The modern-day states of Bahrain, Kuwait, Oman, Qatar and UAE are the archetypal Gulf Arab states. Saudi Arabia is often considered a Gulf Arab state although most Saudis do not live in Eastern Arabia.