The only fans pulling air out are the ones in the top on the radiator and the one at the back, the 6 front fans are shooting air in.
That’s heavy overpressure then. Push/pull adds about 20% over single fan on an air cooler. I don’t know what the number is on a radiator. Likely depends on the radiator. I would say it is probable the new case will be a lot more quiet. I don’t know if temps will improve or not. There’s a lot of open grillwork to exhaust overpressure.