The Kurds are, primarily, Sunni. This would mean that that would have some differences with Shiite Arabs (such as Iraqis) but not with Sunni Arabs (such as Syrians). In addition, not all Arabs are Muslim. Many Arab countries have large Christian minorities, so of course, Arab Christians would have differences in religion.
However, in general, there is little or no difference between Arab and Kurdish religious beleif.
17 years of living in the Middle East