Yes. All paladins are extremely devoted to one cause or organization. Some of these organizations are religious, like the Fellows of St. Waidwen Martyr (Eothasian). Others are political, like the Brotherhood of the Five Suns (Vailian Republics). Some are just extremely devoted to a rigid way of living/working/existing, like the Goldpact Knights (essentially mercenary paladins). Paladins gain their powers from their extraordinary devotion, regardless of what their particular cause may be. Priests tend to be more philosophical, introspective, and nuanced in how they think about/approach things. Paladins don't generally heavily emphasize self-sacrifice for its own sake, but much more than priests, paladins believe that "the cause" is more important than they are -- though they often disagree with how to best help their causes.