"None of the options listed above are pressure rice cookers, they are all normal electric rice cookers. The steam is allowed to escape during the cooking cycle, so the pressure doesn’t build up like it would in a pressure cooker.
Pressure cookers are known for cooking things at higher temperatures and at quicker speeds. When pressure cooking rice, as the pressure builds, the boiling temperature of the water rises and this enabled it to penetrate deeper into the grains of rice.
Rice which has been pressure cooked tends to stay softer longer.