Comfortability is everything. It's a trade off between the two. The 22, yet concealable will be somewhat awkward to wear under clothing. The 23 is perfect. But if the 23 is less comfortable in your hand, you need to see if it's controllable when you shoot.
"Tolerance is the Virtue of a man without Convictions" G. K. Chesterton
Considering the fact that the victim is the first one at the scene of a violent crime, I believe all law abiding citizens should be armed.
"Fast is fine, Accurate is final." - Wyatt Earp