I get what you want to say.
From my perspective they are all the same, the abuse both sexual and emotional causes the same kind of trauma no matter the "sordid degree" the infidelity reached in practice.
Your question has some logic, the "mild" I would rather call cognitive dissonance between uncertainty and expectation the betrayed partner feels.
You are going to torture you to find out why you have been betrayed by your closest person for a while, that’s inevitable.
If the cognitive dissonance is kept by uncertainty if what it was done to you was "awful enough" to run away and save yourself, then the limbo is longer than to cut ties from, and your abuser out of your life.
The damage is the same, but the trauma may get you stuck.
If the degenerate debauchery of your wayward is so obvious that it gets you to feel a visceral disgust, then it’s easier to sever the toxic connection with your abuser.
Not easy but easier, when you can see the face of evil you can unfreeze, when the evil hides under a guise of human flaws and false remorse, you question yourself.
Then the limbo is longer.
That’s how I can see the answer to your question