Fallout 3 Mods - Animated Wasteland Trees by Ashens2014 

It would indeed, I use the same mod (Dead variation also) and this mod's assets definitely overwrite the Flora Overhaul's ones.

An "Animated FO3 Flora Overhaul" would be really amazing. I used the "Dead Edition" during my long playthrough. It's unlikely a mod like that would happen. It involves editing other people's mods and animating dozens of NIF files.