Meh, given that Birkin created the thing that gave Wesker his powers and that his imperfect G-Virus (when controlled with DEVIL) apparently made Sherry immortal* and gave her a healing factor that heals fatal wounds in seconds, I'd say he still wins.
*: She sure looks younger than she should be. Keep in mind that she's six years older than Jake.
Suffering is a fact of life. You survive if you find a reason to endure it.
So what would he be like as an X-Men, people? Come on, speculate.
"Extremism in the defense of liberty is no vice!"
Fiction is a fickle thing. It all depends on the next word that is written.