Buy some, stack up some drywall and plywood simulated floor and wall framing and see how much stuff these will plow through. I hope you conclude slugs are a poor home defense choice for that and other reasons.
And buy some 4 buck and 000 buck and compare. See if they shoot to point of aim. See how the pattern spreads at 3, 5, 10, 15 yards. Get an idea where the lead goes, and also how far.