Trion Juggernaut isnt really Juggernaut, it's Just Cyttorak in his mortal form. 8th Day Juggernaut is the strongest form of Juggernaut, he has 100% of Cyttorak, plus his own original power which is about 60% so all together 8th day is about 60% stronger than trion. 8th Day would stalemate Classic Herc for a while but eventually (probly after about a couple hundred years or so) 8th day would win. Trion would stalemate Herc for a long time, but eventually Herc would win.
Eight Day Juggernaut is when he was under the influence of the wager and tapping into his full potential. Trion Juggernaut was when he was possessed and made to attack the Trion's dimension so was understandably super beefy.
And guess what, armando, if he had 60% of Cyttorak's power, which he didn't, and later had 100%, which he didn't either, that doesn't mean he has 160% of Cyttorak's power. It means he would have 100% flat. It's like trying to take 14 slices of pizza from a pizza that only has 8 slices. It just doesn't work.
And if Eight Day Juggernaut was that powerful it would defeat the point of the dieties of yore making the wager in the first place.