Generally, Omni-Man is stronger. He has superior physical abilities and a longer history of using his powers effectively. However, Invincible has shown potential to catch up over time.
Sure. Invincible's journey in the comics sees him continuously evolving and getting stronger. Eventually, he outpaces Omni-Man, but it's not an easy or straightforward path. There are many challenges and setbacks along the way.
The Omni - Man story is centered around a character who appears to be a typical superhero at first glance. He saves people, battles villains, and is adored by the public. But underneath all that, he is an alien with a mission that is not in line with what the people of Earth expect. His power level is off the charts compared to Earth's defenders. His internal struggle between his loyalty to his home planet and his newfound relationships on Earth, especially with his family, drives much of the story's drama. There are also elements of political intrigue in his home planet's plans for Earth, which makes the story even more engaging.
In fanfiction, Bardock and Omni - Man are often combined in interesting ways. Bardock is from the Dragon Ball universe, known for his sacrifice. Omni - Man from Invincible has his own complex character. In fanfics, they might be pitted against each other in battles of strength. This can lead to exciting scenarios where their different powers and personalities clash. It also allows for exploration of how their respective moral compasses would interact in a fictional crossover.
Well, Omni Man's story in comics is full of surprises. He might switch allegiances, undergo power changes, or face unexpected challenges that force him to evolve.