Certainly! The Simplex 4100-9404 is indeed a newer model compared to the 4100-9401. While both are part of the 4100 series, the 9404 offers several enhancements over its predecessor. One notable difference is improved processing power, allowing for faster detection and response to fire events. Additionally, the 4100-9404 typically comes with expanded networking capabilities, enabling better integration with other building systems and enhanced monitoring options. Overall, if you’re looking for improved performance and scalability, upgrading to the 4100-9404 could be a worthwhile investment.