Enanthate and cypionate are virtually identical so go ahead and use either one , Test E is suspended in sesame oil while Test C is suspended in cotton seed oil..............
Test E has a 7-carbon ester chain , Test C has an 8-carbon ester chain , the more carbon the ester grouo has the more soluble in oil it is, as a result Test C has a slower release and longer active life , due to 1 atom lighter Test E has more test per mg althouth the difference is insignificant .. bottom line is basically the same ...