In one of the most remarkable manifestations of the "Twice-Told-Tale" parallelism between worlds, we present for your consumption the battle of "Superman VS Shazam", golden and bronze age editions (although the latter tale, chronologically, was published years before the former). Since Captain Marvel debutted only a couple years after Superman had himself made history, on and off the pages of comics these two have waged an epic war. In the first decade of their concurrent existence, Marvel reigned supreme in sales, while at the start of their second full decade it was the Man of Steel who won the right to wear the mantle without a chellenger to his comics dominance.
These tales begin with the power mad ravings of to lunatics, whose insane lust for immortality led to pain and heartache for their peoples. While Karmang wished to collide the parallel planets of Earth-One and Earth-S into one another in order the restore his shattered race, Hitler wished to counquer the old and new world of Earth-Two to restore what he believe was his master race. In so doing, this destructive duo created agents to manipulate towards their cause. Karmang revived Quarrmer the Sand Superman and Black Adam the black sheep of the Marvel Family.
In the process, both madmen sent their psuedo-Captain Marvels to attack the Supermen, with the hopes that they could remove such obstacles from the equation and also to deliver a destructive device that would extinguish civilizations other than their own. During their prolonged battles, it was quite evident that Earth-One's Superman was evenly matched with Captain Marvel, who was also evenly matched with Earth-Two's Superman. After Supes and Cap first fought each other's imitators, Quarrmer and Adam, disguised as their opposite numbers... and the original Supes battled the cloned Cap... a return battle versus the real deal proved a stalemate.
Thankfully for our pair of powerhouse protectors, they had more rationale thinkers of the fairer sex who help their male mates from behind the scenes. Supergirl enlisted Mary Marvel to take the battle to Karmang as they dynamic damsel duo attacked his fortress on Mars-One. Meanwhile, Wonder Woman saved her Earth-Two from Mary Marvel's attack on Britain alongside her Justice Society allies as they tackled the Marvel Family. Eventually, the Amazing Amazon and World's Mightiest Girl along with Supes can Cap saved the day!