> They're in almost every grocery store around here (I can only assume they're popular), 88% cacao, and much less bitter/harsh.
Evidently you're in Utah, USA.
It's good to mention actual location, rather than 'around here', for people that don't know where you are.
McDonalds are pretty much everywhere - that means they're popular, by definition, however most discerning consumers wouldn't consider them a high quality product.
Some tomatoes are considered acidic, but in practice most tomato varieties have the same acidity - just varying levels of sugars, which makes them taste more / less acidic. Is the 'much less bitter' quality of this bar you're referring to a result of a higher ratio of sugars?