[Phantasm]

APCs tend to carry more troops with lighter support weapons, often without a main turret; IFVs carry fewer troops on average but have heavier support weapons, often on a main turret. Armor varies by nationality and manufacturer, but IFVs tend to have better armor.

An APC will often carry 10-15 soldiers plus their gear, with a crew of 2, and armed with an exposed mount machine gun for protection. IFVs carry 6-9 soldiers, a crew of 3-5, and will mount anything from a 30mm chaingun up to a 90mm tank gun or a set of recoilless rifles/missiles for offense. A good comparison is the M113 APC vs the M2 Bradley IFV, though the Bradleys tend to be pretty light on armor (for various reasons including but not limited to being designed by committee).