Is there a good breakdown of the differences between and tangible benefits of the newer processor? I'm assuming it's just extra horsepower to handle the extra features like Bluetooth, WiFi, etc.
No good explanations or publicity info available, you need to be a customer to get much information out of them, and then it can't be disclosed to the public. It is not very exciting anyway!
The main difference between processors seems to be the number of processing cores, so as you suggest, the amount of horsepower. Some can only manage 1 video channel, others are happy with 3 channels just because they have more processing cores, some only manage FHD, some 4K, some 30fps some 60fps. Then some have extra processing blocks for image processing and AI type functions. Sometimes they do add significant things, such as better audio and video interfaces, but we haven't seen significant improvements for a while. More interesting is what they add to the SDKs, but like Apple adding things to the IPhone OS, new things often work on models going back many years. If they could manage to add a good HDR then that would be significant, but so far the results have not been very impressive.
So currently, the processor numbers are not very exciting, maybe someday they will be again, but not at the moment, the interesting bit is what Viofo manage to do with them. Someday they will add a new codec and hardware for AV1, and then we will be looking at the processor numbers again!
haha I'm working on an A119 Mini vs. A119 v3 comparison right now. It looks like there's still new firmware coming out and bug fixes being implemented on the newer Mini so I'm still wondering when it makes sense to do the review. That's a pretty typical thing to consider though when doing reviews of newly released stuff.
If you wait for the perfect firmware, it may be a very long wait!
Might make sense to wait for the next one though, they haven't been releasing very regular firmware updates this time, so there is probably going to be quite a bit in the next update. Most of it already works quite well though, no reason why you shouldn't collect some video.