The EcoSave option in the Variant allows for a more customer ink saving that lies between Eco Save as a variant and Visual Match.  In other words, it allows for a less stringent K replacement than EcoSave as a variant but more than Visual Match.

How to read this:

- The % defines how aggressive the ink saving should be.  E.g. 80% :  means he will save 80% of ink at the point where he is allowed, which is defined by the Delta E value.
      If 0%:  then no CMY replacement will take place,  If 100%:  all CMY is replaced by K only. 

- Delta E: defines how many patches are eligible for that ink saving.  The higher the Delta E the more patches are considered for ink saving.