A119S is proven to be a good performer both day and night. The A119 Pro has only just been released. It's a new sensor manufacturer for Viofo and Novatek, so the firmware will take a while to develop and get the best out of the components. Even then, A119S is likely to be better at night due to having larger, more light-sensitive pixels. The A119 Pro can deliver more detail in good light as it has more pixels.