Both pots are excellent LN2 pots as the two are very close in capabilities. If you own an F1 and are happy with it, there is probably no reason to run out and buy a BEAST, unless of course, you'd like to have 2 CPU POTS around the lab. If you do not own a CPU POT and want to buy one, I would give a great deal of consideration to the der8auer BEAST as it is a great pot. The F1EE is no longer made, and we don't have a read on the Gemini pots at this time, therefore, I would give the BEAST the hands down must buy, kick ass rating in this price range.