Nolv and aromasin are different "anti-e's". Nolvadex is a selective enzyme receptor modulator and aromasin is an aromatase inhibitor. Nolv will help prevent gyno, but not do much for estrogenic bloat or fat gain. Aromasin lowers the total amount of estrogen in the body by about 85%, preventing bloat, gyno, and if too much is used your sex drive.