Efficiency ratings are taking from fresh healthy filters, they don't make allowances like they do with oil testing such as noack and hths that put oil under duress to test how oil is long term. There is no comparison between filter medias when you have such an inferior media compared to a media that out lasts any oil. Surface area is also very lacking in how a filter filters, when you see surface area on wix xp being more then rp but you actually see how poor the filtration is in comparison, it is a stat that is clearly misleading without spelling it out, higher surface area is a hindrance to filtering when you don't compare the amount of media. What was the reason for the less surface area, clearly both filters media are not the same thickness, which apparently doesnt make any chart or test, and is the main gauge to how well a filter filters.
There is a old saying that sometimes has real teeth, "a picture is worth a thousand words", sometimes it is that simple.