Which head/combustion chamber is better for performance? Speed master aluminum LA or aftermarket magnum iron head?

Just the Chinese repo with a few engine quest heads and an occasional RT set popping up for a quick second at the different marketplaces either under $2K usually sir.
EQ is back Parts - EQ Cores & Recycling

The Promaxx are new castings but they are just $200 cheaper than the Edelbrock Magnums ($1150). DODGE 5.9L/360 Mopar small block Magnum Cylinder Heads - Free Shipping on Orders Over $109 at Summit Racing
Engine Quest is back with the

I will be purchasing Performance Injection Service new EQ heads with Level 1 porting for my '98 Grand Cherokee 5.9. For a "max performance" build where iron was a requirement the Level 2 porting is much more extensive ($1900). Advertised to flow 212 cfm @ 300" lift. 290 cfm. @.500"+. SSR, deshroud, blend, pushrod, pinch, valve guide blending, competition valve job, ...
Mopar EQ Cylinder Heads