It's important to note that those ratings are all tested under specific conditions that includes a rather short (~3m IIRC) lineset and other parameters of insta

It's important to note that those ratings are all tested under specific conditions that includes a rather short (~3m IIRC) lineset and other parameters of installation that in the field can lower the capacity as more energy goes to the pumping of the liquid refrigerant. Particularly the lineset length. Also, the testing varies between "traditional style heat pump" and inverter driven "VRF" equipment. That's not to say that the AHRI information isn't useful, but the numbers can be a little subtle to get to an apples to apples comparison and you should have a selection done based upon some real estimated line lengths and installation conditions.