icon and I discussed this on the first page of this thread (starting
here). To summarize:
Advantages of a shotgun for home defense:
- Greater stopping power.
- Less reliance on accuracy.
Advantages of handgun for home defense:
- Better ergonomics. It is much easier to safely and effectively operate a handgun with one hand leaving your other hand free to use a phone, flip a light switch, carry a small child, manipulate a door lock/knob, or use a flashlight. It is also easier to operate a handgun in tight spaces, for instance, hallways around bedrooms.
- Greater range of options and smaller space needed to keep a handgun safely and securely at the ready.
Risk of over penetration is a concern with both. Everything else (follow-up shot speed, ammo capacity, reload times) is largely determined by the specific model of handgun or shotgun you're using and your skill with the weapon.
TL;DR: go with the weapon you are most proficient with.