Dmz is a strong as compound and if your goal is to gain weight. Dmz will be your better option.
However, the gains off it aren’t the best when It comes to quality. A lot of water weight and glycogen comes into play with dmz. I’ve ran it once, didn’t really enjoy it, liver values were high, started to get puffy nips, and I was inflated like a ballon. Gained 20lbs, kept maybe 10 of that
Never done epistane, but it seems like it’s better for hardening effects as well as lean dry gains. You might only gain 5-10 pounds. But will the right diet should be lean quality gains that you can hold onto for much longer