I don't recall any feats from Juggernaut to suggest he hits as hard as Ronan. Ronan was able to send Drax flying back over 20 feet with a casual palm thrust (which is especially impressive considering Drax jumped at him, so he countered Drax's forward momentum as well). And he showed better fighting skill than Juggernaut as well. Drax was also drunk, so not at his best. And Drax's durability feats from the 2nd film crap all over his fight with Ronan. During the ship crash scene, he was bouncing off several trees at high velocity, and was literally laughing when the ship finally came to a stop. He also took hits from the Abilisk (the giant monster they fought at the beginning of vol 2) without sustaining any injuries.