Anker Nano Charger Neo, A120M, and Anker Nano Charger (45W, Smart Display, 180° Foldable), A121D, are both Anker Nano series chargers, but they are designed for different user needs. 

A120M (65W): Ideal for users who prioritize fast charging performance, lower charging temperatures, and broad device compatibility. It supports up to 65W output, AVS and PPS protocols, and charging technology to help manage temperature. It can charge a wide range of devices, including smartphones, tablets, earbuds, watches, and laptops. 

A121D (45W): Ideal for users who want smart charging information and enhanced battery care features. It features a smart display that shows real-time charging information, including charging power and device status. It also includes Care Mode to help support long-term battery health.