They're not the same. Everett Ross and Thadius Ross have separate identities and storylines in the comics. Their powers, if any, and character arcs are completely different.
Female Jesse could develop from being a bit naive in some ways to becoming more street - smart. Interacting with Aiden, who has a different set of skills and experiences, would expose her to new situations. She could also grow in confidence, especially in her ability to handle difficult situations that she previously might have shied away from.
This could be a story about a character named Aiden who has some lovely and cool experiences during Christmas. Maybe Aiden is a child who discovers the magic of Christmas in a really cool way, like finding a hidden present in a very lovely, unexpected place.
One great Aiden Pearce fanfic is 'The Redemption of Aiden'. It shows Aiden in a different light, dealing with his past actions and trying to make amends in the city he once terrorized. It has some really interesting character development.
Aiden Watchdogs fanfics often focus on Aiden's skills as a hacker. They show how he can manipulate the city's systems. Also, many fanfics explore his moral compass, as he sometimes walks a thin line between right and wrong in the game world.
In Watchdogs fanfic, Aiden Pearce is often depicted as a more vulnerable character. While in the game he seems tough and in control, fanfic can show his moments of doubt and weakness. This makes him more relatable. For instance, a fanfic might show him struggling with the consequences of his actions in the hacking world, which adds depth to his character.
The pregnancy in the Emily and Aiden fanfiction could bring out different sides of their characters. Emily, who has been so focused on revenge, might start to show a more nurturing side. Aiden could become even more protective. There could be a lot of drama as they try to keep the pregnancy a secret from their enemies. They may need to make sacrifices in their revenge plans to ensure the safety of the baby. For example, they might have to postpone certain operations or take less risky actions.
I'm not sure specifically what the 'aiden animations story' is about as it could be a very unique or personal creation. It might be about the adventures of a character named Aiden in an animated world, perhaps involving his friends, family and the challenges he faces in that fictional realm.
Since I don't have a lot of information about this specific story, it's hard to say exactly who Mike Ross is. He could be an ordinary person with an interesting personal story that involves some sort of growth or change symbolized by 'big boy pants'.