When it comes to physical durability, ‘Juggernaut’ and ‘Hyperion’ rank near the top of Marvel's list, but who would triumph if they went head to head? The answer isn't merely a matter of strength, thanks to the magical nature of Juggernaut's abilities and Hyperion's wide range of powers, but looking at each character's comic history offers a solid answer on which is mightier.
Originally created by Roy Thomas and Sal Buscema, there have been multiple versions of Hyperion in Marvel Comics, often from alternate realities. Hyperion is generally treated as a pastiche of ‘Superman’ - often an evil version of DC's ‘Man of Steel’ set on conquering alien worlds - and the leader of the ‘Squadron Supreme’.
Meanwhile, ‘Juggernaut’ is a sometime-villain, sometime-anti-hero created by Stan Lee and Jack Kirby, often facing off against the ‘X-Men’ with the powers granted to him by the Crimson Gem of Cyttorak - a demon lord who feeds on the destruction he causes.
Hyperion and Cain Marko's ‘Juggernaut’ have clashed at least once in a decisive battle - in Jeff Parker, Kev Walker, Jason Gorder and Frank Martin's Thunderbolts #153 - but Hyperion's nature as a multiversal traveler means they've actually fought countless times. While Juggernaut won their Thunderbolts face-off, the fight only ended due to Ghost, Moonstone, and Man-Thing joining the battle and setting off an Argonite fail-safe that disabled this version of ‘Hyperion’. Up until being confronted with his version of kryptonite, the battle suggested that ‘Hyperion’ was stronger than Juggernaut, though it was a closer match than many might have assumed, and Marvel's ‘Superman’ even injures his hand punching Juggernaut without his helmet.
Juggernaut's ace in the hole in any powerhouse match-up is the specific nature of his powers. Juggernaut is granted magic momentum by Cyttorak, meaning that once he begins running, he quickly becomes impossible to stop.