O/C is a disadvantage since by and large only 10% of the population is armed on the streets. Therefore if any thugs see your firearm they may be tempted to grab it from you.I have never understood the point of a concealed gun. If i am packing heat, which is seldom, I want people to see it as a deterrent. of course, I live in AZ where we have 75 MM cannons in our car grills.
C/C is also more discrete.
I don't want people to know I am armed until I draw and aim at them.