This question I had in mind when I found this mod that changes zombie speeds.
Mod that I was using "Random_Zombies" ID 2818577583
but switched to "Random Zombies - Day and Night" ID 2888099799

So instead of waiting for responses I decided to make this answear that YES it both works in combination.

I am basing this on those informations from mod creators.

Crius 27.02.2023 10:18
Hey there @Vesper, I'm the developer of Random Zombies - Day and Night (https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2888099799) and was wondering if there could be compatibility. Judging by your description it could be as you seems to change only the animation frames but I thought to ask before digging into your source code. My mod uses the algorithm from "Random Zombies" but add day/night/weather scheduling as well. What it does is override the speed, health and sight+hearing+door opening according to a percentage distribution. Does your override any of these values? I'm free for a chat if you think it's easier than writing in these comments :)

AZoT 27.02.2023 18:55
@Crius My mod only changes speed of animations in sprinters AnimSets without any scripts, 100% will work with other scripts unless script somehow alter that AnimSets.

Crius 1.03.2023 13:16
Thank you for confirming @Vesper. I just checked and can confirm there is no conflict between the two :)

So if someone is wondering then no more worries