1. Receive Bands and Modulation: The SI4769-A10-AM supports the full AM (520kHz–1.71MHz) and FM (64MHz–108MHz) broadcast bands, including RDS functionality. In contrast, the SI4769-A41-AM supports only the FM band (64MHz–108MHz). The A41 variant completely lacks AM broadcast reception capability, which is the most fundamental functional difference. 2. Supply Voltage Range: The A10 supports a wide supply voltage range from 1.5V to 5V, whereas the A41 operates from 1.2V to 3.6V. This implies: - The A10 offers greater power supply design compatibility and can accommodate more relaxed power environments (e.g., it can be powered directly from a 5V or 3.3V system). - The A41 has stricter supply requirements and cannot tolerate 5V. If the original design supplies 5V to an A10, directly replacing it with an A41 will damage the device. 3. Application Grade: The A10 is explicitly designated as "Automotive" grade, having undergone more stringent reliability qualification for demanding environments such as automotive electronics. The A41 datasheet does not specify this grade; it is typically considered commercial or industrial grade. Substituting it in harsh applications like automotive requires re-evaluating whether reliability meets the necessary standards.