Like most things, people have different views and opionins, both could be correct, a lot will also depend on the installation constraints.
A hybrid inverter is connected to its batteries via DC, the voltage between the inverter and batteries is lower than mains voltage (often 48v but different systems vary), so cables need to be thick and short to handle the current, so the batteries need to be close by the inverter.
An AC coupled battery has its own inverter built in so outputs 240v, so could be installed far way from the solar inverter perhaps making installation more convenient.
In a hybrid inverter you are limited to the capacity of that inverter, but with a solar inverter and a separate AC coupled battery you would likely have more power available whilst the sun is shining, the capacity of the solar inverter (depending on the sun) and the AC coupled battery inverter.
I should think a PV system with AC coupled battery is more expensive, as you'd effectively have two inverters to pay for.