These are nice things to have but read these forums where folk use them for "storage." They forget these are less reliable than internal drives. As to one better than other I can't see where that can be determined.
Looking for the difference and which is the better of 2TB external Hard drives between Seagate Free Agent Desk versus Seagate Go Flex Desk 2TB with Replica. I have a Toshiba Qosmio 35 Laptop and need external storage and backup but trying to tread through these drives with similar but different terminology is like treading through a mine field that is mostly a foreign language to me.