What is the difference between Yamaha psr-xxx and psr-sxxx and psr-orxxx Keyboards?

The Yamaha PSR-xxx series generally represents entry-level keyboards with basic features suitable for beginners. In contrast, the PSR-Sxxx series offers more advanced capabilities, including professional sounds, extensive voices, and enhanced performance features, catering to intermediate and advanced players. The PSR-Or series, specifically designed for Oriental music, includes unique instruments and rhythms tailored to Middle Eastern and Asian music styles. Thus, the main differences lie in their target audience, feature sets, and musical focus.