Catalog products are pre-designed items that you can choose from a selection of existing options. These products often have set specifications, such as color, size, and material, but you can usually add your logo or branding to them. They are generally quicker to produce and may have lower minimum order quantities. Fully custom products, on the other hand, are designed from scratch to meet your specific needs. You have the freedom to choose every aspect of the product, including design, materials, and features. This option is ideal if you have a unique vision or specific requirements that catalog products can't fulfill. However, fully custom products typically require more time for design and production and may have higher minimum order quantities. In short, catalog products offer convenience and speed, while fully custom products provide complete personalization and uniqueness.