In terms of quality and value, rosewood is generally considered better than green sandalwood. Rosewood is highly prized for its rich color, unique grain patterns, and exceptional durability, making it a sought-after material for luxury furniture, musical instruments, and carving. Green sandalwood, while also valuable, is less dense and may not possess the same level of luster and durability as rosewood.

The density of rosewood is a significant factor contributing to its superiority. Rosewood typically has a density of around 0.8 to 1.1 grams per cubic centimeter, which is higher than that of green sandalwood, which ranges from 0.6 to 0.8 grams per cubic centimeter. This higher density makes rosewood more resistant to warping, cracking, and other forms of damage, ensuring that items made from it maintain their structural integrity over time.

Additionally, rosewood is known for its rich, dark red to brown color, which is highly sought after in the luxury market. The color is derived from the heartwood of the tree, which contains a high concentration of natural oils and resins. This coloration not only adds to the aesthetic appeal of rosewood but also contributes to its longevity, as the oils help to protect the wood from moisture and insects.

Furthermore, rosewood is classified as a protected species under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which has led to a significant increase in its value. The rarity and legal restrictions on its trade have made rosewood a highly coveted material, often fetching premium prices in the market.

On the other hand, green sandalwood is valued for its aromatic scent and medicinal properties. It is commonly used in traditional Asian medicine and as an ingredient in perfumes. While it may not match rosewood in terms of density and color, its unique properties make it a valuable resource in its own right.

In conclusion, rosewood is generally considered better than green sandalwood due to its higher density, superior coloration, and increased value in the luxury market. However, the choice between the two ultimately depends on the specific application and the desired characteristics of the finished product.