Aluminum vs Iron compression on pump gas

Question, would you say that 10.75:1 Iron Head on pump fuel would be the equivalent of 11.25:1 Aluminum Head on the same fuel?? Dont want to run race fuel but I will if needed, it is sold at the pump where I live.

I am about to throw down some cash on my heads and intake, I would like some input.

I HAVE ALL OTHER PARTS EXCEPT THE HEADS AND INTAKE.

I will be buying this week and it is between the Fully Ported EQ Magnum Heads with BEEHIVE springs and fully ported Edelbrock Heads with same springs.

Quench will be in the .034-.036 range with either head.

Eq Heads are 62cc at 10.75:1 and I can take them down to bring compression up more but dont think it is needed.

Edelbrock Heads 58cc Comp is at 11.20:1

Cam is 256@50 Hughes Solid Flat tappet 106 LSA

Also I was going to run the Eddy Air gap port matched but I am leaning toward a Victor Jr as same.

My combination should be really close to 600hp with tq close.

Been working on this build for about 9 mos and it is time to finish it.

I do not baby my cars, I run them very hard. Street/Strip use.....

I used a program and it says cylinder pressure will be in the 190-200 range

This is a 4spd..............

Your Thoughts??