I wouldn't really say very differently. Residential AC and Heat Pumps are available in pretty the same spec range. You can make an AC by removing/replacing some

I wouldn't really say very differently. Residential AC and Heat Pumps are available in pretty the same spec range. You can make an AC by removing/replacing some parts from a Heat pump and that's what some manufacturers do, meaning they're literally almost the same (except for the reversing valve, accumulator, outside meter and defrosting and some other small stuff)