[BS or OLD CPU] ROCK PI S IMAGE CHOOSE

I have two versions of RK3308S and RK3308BS in my hand for experimental evaluation. After mass production, I was told that there is still RK3308S in the shipment. It is not confirmed that it must be RK3308BS.

I am now facing challenges in the production of software packages. The software packages after 2022/4/1 do not seem to support the old CPU of RK3308S. Is there a more detailed description of the differences in startup files and kernels between RK3308S and RK3308BS? Is there a software package that supports 2 different CPUs at the same time?Thank you for the official answer.

Google knows something.
https://www.google.com/search?q=RK3308S+and+RK3308BS