If they are labeled as "special" then I think they would be more like 'ignore x% of y% resistance to z element'
why would they waste their time being specific? They aren't required to be and a lot of times they aren't specific. For example, if you have 75% resist disease it doesn't necessarily mean you have a 75% chance to not catch it. It COULD mean you have a 75% BETTER chance at resisting it but if those are based off hard numbers or ratios then it could mean anything. for example 10% of 100 is different than 10% of 1000.