1. Frequency Stability: The CA25C1474ILR is specified at ±30ppm, while the CA25C1475ILR offers ±25ppm. The latter exhibits a smaller maximum frequency deviation over the entire operating temperature range, providing higher timing accuracy. In applications such as synchronous communication (e.g., UART, SPI), audio sampling, or digital systems sensitive to clock jitter, tighter stability helps improve system timing margin and signal integrity. 2. Performance Grade: Although both belong to the AEC-Q200 automotive-grade series, the ±25ppm specification typically indicates a higher-accuracy tier within this family. This suggests the CA25C1475ILR likely employs stricter component screening or internal circuit design to achieve superior temperature drift characteristics, resulting in a higher reliability margin in wide-temperature environments such as automotive or industrial applications. In summary, the two devices are fully compatible in terms of electrical interface, package, and power consumption. The CA25C1475ILR demonstrates superior performance in the core parameter of frequency stability, representing a high-performance version within the same series. It can be used as a direct drop-in replacement without introducing compatibility issues.