Originally posted by FinalAnswer
When was Alexia agile?
Darkside Chronicles. She doesn't exactly go around dodging bullets but based on what she has shown, she has the potential to do so. But whether that's canon or not I don't know.
In the same game,William Birkin in his 3rd form can do roundhouse kicks and the Code Veronica Tyrant can prevent a sidewinder from exploding in its face.
Overall, I am going to go with William because he has more potential; he has better transformations and mutations when he is killed.
Although Alexia has a few forms herself, her 2nd and third form aren't much of a threat to William once he mutates into his later forms. Alexia in her first form can manipulate fire to a certain extent however, against another BOW like William its not as deadly since becoming a BOW gives the ability to resist pain.