Broadly speaking, we see that the air conditioning unit has a longer viable working life than heat pumps. The main reason is that you only run your air conditioning unit for half a year, depending on where you live, which roughly doubles the viable amount of use before your air conditioning unit needs to be repaired.
Because they are simplers in design than heats pumps, AC units are also more economical and cheaper to install than their heat pumps counterparts. If you have just one AC unit, you will need a separate heatings unit or furnace to heat your area during the winters months.