The System Sensor RTS151 is indeed a noteworthy addition to our lineup. Compared to the RTS451, it offers several improvements. Firstly, the RTS151 features enhanced sensitivity, ensuring quicker and more accurate detection of smoke. Additionally, it boasts improved reliability and stability in various environmental conditions, providing greater peace of mind for users. Moreover, the RTS151 incorporates advanced technology for better compatibility with modern fire alarm systems, making installation and integration smoother than ever before. Overall, the RTS151 is a significant upgrade from the RTS451, offering superior performance and functionality.