Loads of people ask what the differences between the Hema HX-1 and HN7 are. In the interests of brevity, here’s a chart that outlines all the key differences. Which model is right for you depends a little bit on your needs. To be honest, there are only really two key things that, if you need, would lean you towards the old model – the ability to connect a reversing camera and the option to load your own maps on to it. If neither of those things are important to you, the new model is better in pretty much every other way.