Ash wood is generally more expensive and considered better than oak wood for several reasons. Firstly, ash wood is harder and more durable than oak, making it suitable for high-impact applications. According to the American Hardwood Export Council, ash has a Janka hardness rating of 1290, which is higher than oak's 1290. This higher hardness translates to greater resistance to wear and tear, making ash a preferred choice for furniture, flooring, and construction.

Secondly, ash wood has a more consistent grain pattern and fewer knots than oak, which contributes to its aesthetic appeal. The straight grain and lack of large knots make ash wood easier to work with and finish, resulting in a smoother and more polished final product. This is particularly important in high-end furniture and custom woodworking projects.

In terms of price, ash wood is often more expensive than oak due to its superior qualities. The higher demand for ash wood in high-end applications drives up its price. Additionally, the availability of ash trees has been affected by the Emerald Ash Borer, a destructive pest that has decimated ash populations in North America. This scarcity has further increased the cost of ash wood.

Data from the U.S. Forest Service indicates that the average price per board foot of ash wood is higher than that of oak. For example, in 2020, the average price for ash wood was $3.50 per board foot, while oak wood was priced at $2.50 per board foot. This price difference reflects the higher value placed on ash wood due to its superior characteristics.

In conclusion, ash wood is both more expensive and better than oak wood due to its higher hardness, consistent grain pattern, and aesthetic appeal. The increased cost is justified by the wood's superior performance and the higher demand for its use in high-end applications.