The Det-Tronics U5015A2M13A (012500-206) is an upgraded version of the U5015A2M13F, offering improved features and performance. It may include enhancements such as better sensitivity, faster response times, or additional functionalities. I recommend consulting the product specifications or contacting Det-Tronics directly for detailed information on the specific improvements and advantages of the U5015A2M13A over the previous model.