How you judge the rolling resistance is worse on the PS3?
As for air loss, should be 1psi per month. 2psi per week is too much, means in a month you would have lost 8psi already and you will be under inflated already. Are all your tyres losing air that fast or only one of them?
Get them checked. Look for any puncture (nail/screw), check the valve, check the valve cap also for any pebbles inside and lastly submerge the tyre in water and check the sidewall bead area against the rims...
I didn't say it's worst on PS3. I should say "slightly higher" is around 5-10% difference only. How I judge is basically when I let go my pedal and let the car rolling on it's own, for example, usually the car can roll freely around 200 meters on it's own, but now maybe around 150-180 meters only (ECO driving).
Of course to be fair to PS3, as I stated, I'm using only 2 PS3 tires on the front, maybe next time I change all 4 to PS3 will be more accurate. Overall I found PS3 is very good actually, highly recommend and that's why I will change my rear to PS3 too.
As for the air loss, it's happening to all 4 tires. It's not a particular single tire, it happen equally on all 4 pieces since day-1. That's why I asked. I think I need to get it inspected and change the valve on all four. Does metal or rubber based valve better?