muscular endurance has to do with the bodies ability to get oxygen to the muscle via blood and to flush away lactic acid. Eq will increase you bodies red blood cell count and will increase the bodies ability to bring oxygen to the muscle and thus enhance your muscular endurance.
however, if your RBC gets too high, just the opposite will happen, your blood will be thick and you'll suffer from hypertension.
var for basic strength gains but cycle must be short 6-8 weeks -- Eq for strength plus increased RBC and better muscular endurance, and the cycle can go on for a good 14+ weeks. you will need blood work and check hematocrit during cycle though.
also, you need test as a base for either one of those compounds.