Depending on the temperature set point and AC size, if your set point is just at switch over point, inverter AC might cost more than non inverter as the unit is going on and off all the time.

The heat removal capacity of the AC are also as important.

Met a case where the AC is running at max all the time due to under sized and in that kind of situation, inverter or no inverter will not give any difference as they are running full load all the time.

Too little is never enough and too much of a good thing can be bad.