Enanth is a longer ester so it only needs to be injected twice a week. Prop is a shorter ester and needs to be injected at least EOD, ED keeps your blood levels the most stable. Yes the water retention on Prop is supposed to be less than that of Enanth. I have never used Prop but many people who have say that they don't see as much waterweight. No the gains will be just as good with Prop as they will be with a long estered Test, maybe better. Recommended dose for Enanth is usually 400-500mg per week and Prop is usually 50-75mgs per day or 100mgs every other day.