For my personal experience if you want to buy a new window ac then go straight for O general because it has high cfm that is indoor air flow , more airflow means more cooling.
I have % general ac in my home and all running like a charm. But in one area general is down that is electricity consumption, for me electricity consumption is not important cooling and durability is first place.
As for split ac again my personal choice is O general. Kindly check cfm or cmh before buying ac.ac these days are not luxury but necessity.