Wutong wood is generally considered better than elm wood due to its superior strength, durability, and aesthetic appeal. Wutong, also known as Chinese elm, is a dense, heavy wood with a high resistance to decay and insects. It is often used in high-end furniture, flooring, and construction projects. Elm wood, while also durable, is less dense and may not hold up as well over time, especially in outdoor applications.

The strength of wutong wood is a significant factor in its superiority. It has a Janka hardness rating of around 2,820 lbf (pounds-force), which is higher than the Janka rating of elm wood, which typically ranges from 1,290 to 1,470 lbf. This higher hardness makes wutong more resistant to dents, scratches, and wear, making it a better choice for furniture that will be used frequently or in high-traffic areas.

Additionally, wutong wood has a rich, dark reddish-brown color that can age gracefully, developing a lustrous patina over time. This aesthetic quality, combined with its durability, makes wutong a preferred choice for high-end furniture and interior design projects. Elm wood, while also having a pleasant grain and color, may not age as well and can be more susceptible to fading and discoloration.

In terms of environmental impact, wutong is also a more sustainable option. It is a fast-growing tree that can be harvested more frequently than elm, which is a slower-growing species. This makes wutong a more eco-friendly choice for those concerned about the environmental impact of their wood products.

Data from the Janka hardness test and the Forest Products Laboratory at the University of Wisconsin-Madison support these claims. The Janka hardness test is a standardized measure of wood hardness, and it is widely used to compare the durability of different wood species. The higher Janka rating of wutong wood, as well as its superior resistance to decay and insects, make it a more durable and long-lasting material compared to elm wood.