On the VRC Spatial Audio Source there is an option to use the volume curve of the Audio Source for spatialization. (Use Audio Source Volume Curve) This setting is currently ignored during auto conversion which can result in Audio Sources being quieter, louder, etc than they are supposed to be.

Here is a video showcasing the issue: https://streamable.com/jmwtfg

Below you can see my Audio Source / VRC Spatial Audio Source settings: