Outsiders Week: Superhuman Studs

Prince Brion Marcov, youngest son of the tiny European monarchy known as Marcovia, enlisting the aid of scientist Dr. Helga Jace in giving him earth-based powers to protect his country from the forces of Baron Bedlam. Gaining super-strength, lava blasts, gravity manipulation abilities, he became known as Geo-Force. Joining the Outsiders formed by Earth-One's Batman, Geo-Force in his civilian identity became close friends with fellow Outsider Black Lightning and a college student.

Sandy Hawkins was the orphaned nephew of debutante Dian Belmont, who had been the girlfriend of Wesley Dodds. When she perished on and occasion when she substituted for Dodds' Sandman alter ego, Wesley took to wearing a costume designed by her prior to her death. He also sought out Sandy as atonement for her passing, adopting the lad and grooming him as his sidekick Sandy the Golden Boy. Alongside his mentor during his solo missions, as well as Sandman's Justice Society cases and a few adventures in the All-Star Squadron, Sandy built up a promising heroic career for himself.

This crimefighting career was eventually shattered when he was mutated by a silicon gun into becoming a new being known as the Silicoid Creature. Manifesting a separate personality, this thing was the counterpart of Metamopho. After decades as this creature in a sleeping state enducd by Sandman, Sandy was transformed by to a humanoid by his mentor, just like he had been yet manifesting earthquake generating abilities.

One power that Sandy did not manifest, which Geo-Force possessed, was anti-gravitational flight. This ability was harnessed by Sandy's All-Star Squadron teammate Hawkman and Hawkman's ancestor Prince Khufu. Although Khufu was the Earth-Two version of Earth-One's Rex Mason (Rex was the man who would become Metamorpho), this Prince shared both the royal title and the secret of anti-gravity with Brion. 

So in other words, Outsiders Rex Mason and Brion Marcov... and All-Stars Khufu and Sandy Hawkins... swapped some attributes with their teammates possessed by their counterparts.