I built the sfx exactly the same way in both sims... Believe me, I know it, I did it so many times with SC!!
At the time, I thought it was related to the size of the new wav files added or replaced with Sound Editor.
My sfx got quite larger with the Boomer pack, Hyperacoustics mod and other Sonarman files; I also added some larger files for the shrimps and whales... I wasn't very surprised to hear the clicks!
