Here they are. They are pretty much both the same. A randomly selected case switch set to change the "feedback praise" to one of ten possible phrases. I placed mine in the Quiz Overall feedback. Perfect_score was used for a grade boundary of 100%. Moderate_score was used for a grade boundary from 80% to 99%. I also sometimes added other Generico filters to further personalize the feedback, usually simply by using a filter that added their names.
Note that if you are reviewing quiz results and you reload the page, the feedback will again randomly select another feedback to show on the refreshed page.