With that...LOL Macro settings for those who don't know what they are, is nothing but a marketing strategy that lens manufacturers add as a feature on the lens. A true macro will give you 1:1 images at close focusing distances, which leaves the EF 50mm Macro for debate, but with a life-size converter it is 1:1. Funny thing is that for the money of the 50mm and the converter, (providing you have a crop body) you can get the EF-S 60mm Macro which is 1:1 out the box or if you have a FF or 1.3x body, you can get the super sharp Sigma 70mm Macro for less than the 50mm and life-size converter.
Yes, they are not possible to compare. But that is more or less impossible for a beginner to know. A user may read about the macro function of their super-super lens in the lens manual and then visit the Macro forum and be very confused about the difference 
. Remember, no backsies.




