What are the key differences between a HX-2 AMHXD3 HX-2 Theft resistant: A portable navigation system can draw the attention of thieves Thieves will have a much harder time stealing a head unit than a portable unit Portable: Able to move unit from vehicle to vehicle with ease Can be useful for people who drive more than one vehicle Unable to use Wi-Fi reverse camera (Wireless) Can only use a wired reverse camera Can use in conjunction with the HX-2 Hema reverse camera Larger screen and resolution Does not need a compatible head unit to be used with Apple CarPlay compatible Has adventure maps loaded already Battery: No issues with charging cables and ports No concerns with battery life Looks more tidy: Does not require an additional unit / screen mounted to the windscreen Better view of your windscreen GPS satellite connection is generally stronger