Whereas sugar coating involves omitting or downplaying information to make it more palatable, stevia coating is purely additive, preserving all of the original detail, but serving it alongside more pleasant, funny, or comforting information.
Example:
True statement: "She didn't call back because you freaked her out with all the muppet-themed foreplay."
Sugar coated statement: "She might feel awkward because you came on a little strong."
Stevia coated statement: "You have a good heart, and a charming personality, but when you try to bring in Muppet stuff so soon, it leaves them with a weird impression. If you hold off on that until they know you really well, girls will be swarming you in no time."
"I usually stevia coat bad news"
"My family never sugar coats anything, but for us, stevia coating is a time-honored tradition."