I prefer the 45acp over the 9mm because it handles cast bullets better.
A 255gr flat point 45cal bullet doesn't need to expand to work well.
My 45's push the 255 to 800 to 850 fps.
Spring change and square firing pin stop with super brass and you get 900 to 1000fps with same bullet.
May have issues with over-penetration though
Most of my time is spent in the woods.
City use a hi capacity 9mm makes a lot of sense.