As a technician here at firealarm.com, I can tell you that the DSC LC-181 brings several enhancements over the LC-171. Firstly, it offers advanced compatibility with modern fire alarm systems, ensuring seamless integration and operation. Additionally, the LC-181 boasts improved sensitivity and accuracy in detecting potential fire hazards, enhancing overall safety. Its upgraded design also facilitates easier installation and maintenance, saving time and effort for technicians. Overall, the LC-181 represents a significant upgrade in performance and functionality, making it a valuable addition to any fire alarm system.