Which one flows better, factory 6 blade water pump or 8 blade

I don’t remember the years on the explorers. I just used the top halves of the explorer shrouds for the top and bottom of my shroud. They were only $5 for a shroud ( 2 top halves made one shroud) so I bought several to practice with. They fit my cold case 22 radiator really well with some hillbilly mods. If you are interested I can post pics.