Now, see, if Udina had gone to Cerberus because of a misguided wish to do something to help humanity, that in his desperation he sided with an enemy the way Shepard did in order to achieve a higher goal, I would have been SO ON BOARD with that. I would be singing Udina’s praises to the moon. That’s what I wanted to happen. Because that’s a fantastic character. 

But that's not what happens. There is no context for Udina’s sudden, inexplicable betrayal. It’s done so the player can have the satisfaction of shooting him because Bioware thought we’d been waiting three games to do it, and rather than choose the route of better storytelling, they chose to give the player something that they wanted but didn’t need.

Udina, in the end, is exactly what he seemed to be - a jerk. Someone the player can love to hate. Though he has all the tools and characteristics he needs to rise above that and become one of the more meaningful characters in the series, a kindred spirit where you least expect it, he instead becomes a fandom joke.

It’s a little like Khalisah Al-Jilani. People love to punch her, right? But look what happens when you look beyond the gag, and actually talk to her. In ME3 that’s a really meaningful conversation. She’s not a joke anymore, she’s a person. Someone who’s afraid and uncertain, just like the rest of us. Udina could have been the same, someone we or Shepard could have related to in an uncomfortable way. Udina went to Cerberus for help, just like Shepard did. But he failed. How lucky are we that Shepard didn’t? 

I liked the idea of the Citadel coup. It was the execution that made me angry.  

So far they are most definitely different Shepards, aside from their backgrounds (Soldier-Colonist - Ruthless vs. Vanguard - Spacer - War Hero).

mShenko Shepard has a lot less baggage than Exordium Shepard going into things. He lets go of things more easily, takes more enjoyment from things, has a slower burning fuse, likes practical jokes. 

Exordium Shepard is more likely to give you a straight answer but less likely to give a damn about your question. He says more with less, refuses to regret and never gets a good night’s sleep (mShenko Shepard sleeps like the dead. And snores.).

Neither of them can make a pot of coffee to save their lives. Both of them rely on Kaidan as a stabilizing force to keep them from doing something really, really stupid. 

So I don’t know either.