Yes, it can be. In fanfiction, Goku being born with God Ki can completely change the power dynamics. It could mean he starts off with a much higher level of power than in the original story, leading to different battles and interactions. For example, his training might take a different path as he already has this innate God Ki. He could potentially face stronger opponents earlier and form different alliances.
Well, it could make him more confident. Since he has God Ki from birth, he might grow up knowing he's special. He may not have the same underdog - to - hero journey as in the original. Instead, he could be more of a natural leader from the start.
Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
In general, it's a bit of a toss-up. The strength of Manga Goku and Anime Goku can vary depending on the specific arcs and battles. Sometimes, it might seem like one is stronger in a particular situation, but that could change in another.
As I don't have enough information, I can't determine who Mami Ki is in the story. It could be a main character, a supporting character, or even a name given in a metaphorical sense.
Empress Ki is not a completely real story. It's a fictional drama that incorporates some historical elements and characters but has fictionalized plotlines and events for entertainment purposes.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.