The main way to distinguish high-end dining tables and chairs is by their quality, craftsmanship, and design. High-end dining sets are typically made of solid wood or other durable materials, with intricate carvings, detailed designs, and attention to detail. They may also have unique features such as adjustable height settings, built-in storage, or a unique tabletop design. Additionally, the price point for high-end dining sets is often higher than that of mid-range or budget options.