Comparing a compressor fridge to a 3 way operating on 12V is not a fair or realistic comparison IMO. While it’s true that a compressor fridge uses less 12 power than a 3way operating on 12V, I don’t know why anyone would operate a 3 way on 12 volts while camping. Propane is the preferred operating mode for the 3 way when camping as it uses very little 12V. It also uses very little propane.
The main reason I switched to a compressor refrigerator was that my 3 way would not cool sufficiently when the outside temperature was above the mid 80’s.
