Firstly, please don't use Debian testing. It doesn't receive security updates in a timely manner: https://programming.dev/post/20084040
Secondly, it looks like the versions of Nvidia drivers provided in Debian testing and Debian stable are the same:
Firstly, please don't use Debian testing. It doesn't receive security updates in a timely manner: https://programming.dev/post/20084040
Secondly, it looks like the versions of Nvidia drivers provided in Debian testing and Debian stable are the same: