Mini-ITX and Micro-ATX are two popular motherboard form factors designed for compact computer builds. While both offer advantages over full-sized ATX motherboards, they differ in terms of size, features, and price. Mini-ITX boards are smaller, enabling the creation of tiny and portable computers, but they have limited expansion options and can be more expensive than Micro-ATX counterparts. Micro-ATX boards offer a good balance between size and features, providing more space for components and better cooling options at a more affordable price.