HOLLEY AND EDELBROK RPM II QUESTION?

Ok I know these two manifolds flow better, but I was wondering if these two upper n lower manifolds are lighter than my cobra upper n lower?

Also I heard that Holley was better for supercharged engines. I plan on being naturally aspirated. 331 stroker with Afr 185 heads. Would Holley still be one of the best choices?

Thanks again for everyones help.