I think they are the same. all the "old school" guys I know swear up and down that Cyp causes much much more water retention than enanthate though. even if this is true, with letrozole or armidex this shouldn't even be an issue. i think the difference they are seeing is that their cyp is most often human grade upjohn, and their enanthate under-dosed t-200....they are simply getting less test from the T-200, and thus less water retention.