1. Appearance: Torreya grandis is slender, oval, with sharp ends and thin shell. However, Castanopsis eyrei is oval, nearly spherical and has a thick shell.
2. Species: Torreya grandis is a variety of Torreya grandis, a grafted tree with no main stem and dark green leaves. The main stem of torreya grandis is upward, which is a seedling tree with light green leaves.
3. Edible: Torreya grandis is crispy and delicious, and it is a popular nut food in the market. Beech is hard and unpalatable.
4. Value: Torreya grandis has high fatty acid content and low starch content, so it can be used as medicine or food. The price of food torreya grandis is relatively high. The taste of Castanopsis eyrei is not good, so it is mostly medicinal.