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 extra features like a built-in wine rack or buffet. Additionally, the price point for high-end dining sets can vary greatly depending on the brand and manufacturer, so it's important to research and compare different options before making a purchase.