Here's a good pairing that I think will be a nice discussion. The Original Mundus vs Reboot Mundus, the kings of the demon world and the demiurges of their universe, both having god- like power that only the chosen can defeat.
The Original Mundus is not unfamiliar to us in the DMC community. Emperor of the Underworld, he was born from darkness and quickly came to power to rule all of the demon realm before setting his sights one the Human World and being defeated by the hands of his underling, Sparda. Taking the physical form of an angelic statue, and having an avatar of three orbs representing his three eyes, his actual form is a mass of tentacles and three large eyeballs. If his appearance doesn't scare, then his powers sure will. He isn't the Emperor of all demons for nothing. His power is so great that he was able to manipulate the space around him and Dante when they fought, changing it from being outer space- like to taking place in a large lava pit. He is able to create artificial demons like Trish (he even told Dante that he can recreate his mother over and over again if he had wished. That's quite the burn considering he was the one that killed her.), shoot lasers in various forms, and create lava dragons. It should be safe to note that neither Sparda nor Dante have been able to kill him rather he is just sealed back in the Underworld.
Reboot Mundus is just as powerful but has a major weakness. The King of all demons, he and Sparda were "blood brothers" before Sparda betrayed him by breaking a serious taboo and married Eva (who was rebooted as an angel). Heartbroken, he hunted Sparda down until he found him and his family, killed Eva (by ripping her heart out, which seems to be his preferred method of killing), and imprisoned Sparda for all eternity. Not only is he the Demon Lord but he is basically in control of all humanity on Earth, using debt as a chain to keep politicians and world leaders quiet, unhealthy products to keep us docile, and world news media to keep watch, among other things like nightclubs as a form of soul corruption. But, like his Original counterpart, the fear should really be focused on his true power. As long as the Hell Gate remains open, Mundus is practically god, being able to manipulate the dimensions of Limbo so as to cause mass destruction and control everything around him as well as flying at high speeds and being able to slowly poison his enemies through touch. The problem is, once the Gate is closed, he loses his immortality, meaning it would take one good shot to kill him but, even so, he keeps most of his power so it won't be an easy win.
My personal opinion and vote goes to DMC 1 Mundus. While their abilities are very similar, DMC's Mundus can manipulate space so that Limbo doesn't become a factor which pretty much gets rid of DmC Mundus' major source of power.
