Its actually simple physics not the sizes of your units.
If I want to remove 110°F heat from a condenser coil I have to have a temperature lower then 110°F.
We know this cause of the Second law of Thermodynamics, heat moves to cold.
Hence, the closer outside temperatures come to the temperature of your refrigerant in the condenser coils the less amount of heat you will remove. Since the point of an AC system is to take heat from where we don't want it and move it to where we don't care if the system can't remove the heat...........
If you're too "open" minded, your brains will fall out.
Artificial intelligence is no match for natural stupidity.