Personally I take them both. and mix them. But I am the gyno king here. I read an article by a well known person/bb and he suggested taking both, during and post cycle. Estrogen is needed in teh body, yes even in guys, but to much is the key here. When I take to much Armidex/Liquidex, my joints hurt for days, my hands hurt, my shoulders hurt, my chest even hurts. So I balance all this by taking Armidex, once or twice a wek and Nolv in between to space them both out so to speak.
However, to keep the bloating down, Armidex is what is needed, to prevent gyno and to get rid of lumps, Nolv is used (some AS can not reach their full potential without having to convert to estrogen). So can you see the need for both?