The Wither Skeleton's new walking sounds are too quiet when compared to the walking sounds of other mobs.

Steps To Reproduce:
1. Spawn a wither skeleton.
2. Spawn any other mob who uses a unique walking sound (such as a zombie).
3. Listen for the walking sounds of both mobs as they move around (turn up your audio to help hear if you need to).
4. Notice how it is significantly more difficult to hear the wither skeleton's walking sounds compared to the other mob's.

I have both Main and Sound sliders at 100%.
I also have both the hostile and friendly creatures sliders set to 50%.
(These are my usual settings)

I use the many of the same slider settings for Java Edition, and the wither skeleton's walking sounds are much easier to hear on Java.