test enanthate is a single esther. and by esther, imean, propionate,cypionate,enanthate,undeclynate,phynal propionate etc..etc... sustanton has 4 different esthers. i forgot which ones the sust contains, i know its prop,phynal prop, test undeclyonate, and theres one more, i forgot. neither one is better, it depends on what your trying to do. if your going for a clean bulk, i'd use sust, you will hold less water and get better,more keepable gains. with enanthate, you will hold more water, and prolly experience more sides. personally, i'd opt for sust. thats my .02.
a-bomb