HPF is ULTRA HIGH STRENGTH STELL (UHSS). When people talk about numbers like 590, 780, 1000, 1200.....that is tensile strength, not their hardness (Hv). HPF can be fabricate with 900 tensile strength and have >500Hv level. That is some tough stuff.

Bezza max tensile is 590. They scored high ASEAN NCAP because of their small engine, which create more space in the engine room, thus during frontal impact, their small engine have less intrusion into cabin + Active Safety features (which if we remove from the package on the lower line, you basically exposed to serious injury)

In term of frontal crash, it would be equal bcoz bezza small engine+large engine clearance & iriz UHSS.
but if we measure on crash worthiness, iriz & new persona win because their UHSS are well-positioned in all critical area of the body (Front Pillars, Side Members, Center Pillars). I believe new Persona also have HPF on B-Pillar (Center Pillar) for side impact like Iriz

FYI...for those who make fun of bomba dtg potong in the advert...

actually Proton had to demonstrate to inform BOMBA & JPAM about cutting the body of the car especially with HPF/UHSS. Identify them which area to cut since front monoque body are made of HPF/UHSS. It was done during the introdcution of Preve to ensure bomba & jpam have the right equipment in case of an accident.