Purely from the perspective of current image tuning results, the effects achieved through the current range of main control chips (most of which are based on the NTK series) paired with the 678 tuning still fall short of the desired outcome. Similarly, upon reviewing comparison videos of upstream supply chain offerings, the improvement of the 675 over the 335 is relatively minimal, considering their nearly $1.5 USD chip pricing. This might be due to the current main control chips not being able to fully leverage the capabilities of the 675. On the other hand, the parameters and tuning of the 335 have matured sufficiently. The 335 boasts a pixel size of 2μm, which is quite commendable for a 5-megapixel sensor.
This explains why we often witness the Sony 415 not performing as well as the 335 in low-light conditions. Pixel size plays a crucial role.
Looking at supply chain trends, the price of the 678 chip has started to gradually decrease (as more products such as security cameras and dash cams adopt this sensor). This is a promising signal for future mid to high-end 4K dash cams. We no longer have to endure the torment of the 415's nighttime image quality.
A 1/1.8-inch 4K sensor with OV's 08A10, boasting a pixel size of 2μm similar to the 678, yields equally impressive results. Some Japanese COMTEC models utilized this sensor before the 678 hit the market. In terms of night vision, Purecel technology optimization is available, and native support extends to specifications like 8MP@60fps. This implies that with enhanced main control, the prospect of 4K 30fps HDR quality is highly anticipated.
Considering only cost-effectiveness, I believe 70mai's A810 is quite appealing. Priced at only $100 USD with a 678 sensor for the front camera, it's an excellent option. Of course, one limitation is that it only supports 2.4GHz WiFi. The dual-camera version is equipped with the GC2053 sensor, resulting in relatively ordinary image quality. Sony's 678 is accurately positioned, compensating for the shortcomings of previous 415 night vision with its large pixel size. However, as for the 675, even though it carries the Starvis 2 tag, its cost-effectiveness is quite mediocre, and its product positioning is awkward. Apart from the Starvis 2 novelty, I believe it's debatable whether it's worth going over budget for this configuration.